Tag: samsung

The Evolution of Samsung Aftermarket Screens: From Incell LCD to Advanced 1:1 OLED

For years, Samsung aftermarket screens were often associated with poor display quality, missing functions, and unreliable performance. Many repair shops treated them as low-cost emergency solutions rather than serious alternatives to OEM displays.

Driven by advances in OLED manufacturing, panel engineering, and aftermarket supply chains, nowadays Samsung aftermarket screens have evolved into highly capable repair solutions for different business scenarios. For repair shops, distributors, refurbishing facilities and buyback businesses, understanding the differences between screen grades is critical.

In this article, we break down the evolution of Samsung third-party screens — from basic Incell LCDs to advanced 1:1 OLED displays — and explain which option best fits different repair needs and budgets.

Side-by-side comparison of Incell LCD, Aftermarket OLED, and 1:1 OLED screens showing differences in bezel thickness

Budget Repair Option: Incell LCD Screens

The earliest mainstream Samsung third-party screens focused primarily on affordability and functionality recovery. For many repair scenarios, Incell LCD screens still serve an important purpose today.

Widely used for:

Budget repairs
Data recovery
Temporary replacement
Low-cost resale preparation

However, their limitations are clear due to the fundamental LCD structure. Unlike OLED panels, Incell LCD displays cannot support self-emitting pixels. As a result:

True blacks appear grayish
Power efficiency is lower
Contrast performance is weaker
AOD functionality becomes limited or unavailable

Comparison of screen structures showing Aftermarket OLED with three layers and Incell LCD with five layers

More importantly, Incell structures cannot properly support Samsung’s under-display fingerprint sensor technology. This is one of the biggest compromises for users accustomed to flagship Samsung devices.

Physical construction is another challenge. Due to IC packaging and panel design limitations, Incell LCD screens often feature:

Wider bezels
Thicker chins
Smaller viewing areas
Less precise frame fitting

Mainstream Repair Option: Aftermarket OLED Screens

As market demands increased, the aftermarket industry reached a major turning point: the rise of aftermarket OLED screens. This generation significantly improved both visual quality and feature compatibility.

Because OLED technology closely mirrors OEM display architecture, these screens deliver major improvements in:

Black depth
Brightness & contrast ratio
Color saturation & color gamut
Under-display fingerprint sensor
S Pen responsiveness
Ambient light sensor function

Comparison of Incell LCD and Aftermarket OLED screens, showing the OLED's thinner bezels and more vibrant colors

A finger activates the under-display fingerprint sensor on a Samsung smartphone with an aftermarket OLED screen

For repair customers, the experience immediately feels more “premium,” meanwhile the OLED screens became the sweet spot between performance and cost.

However, early aftermarket OLED generations still had one noticeable compromise: the viewing area. Compared to original Samsung displays, this slightly reduced the active viewing area and created subtle visual differences around the corners and borders.

Comparison showing an Aftermarket OLED screen has slightly thicker bezels and a smaller viewing area than an OEM Used screen

Best For:

Mainstream repair businesses
Mid-to-high-end device repairs
Customers wanting original-like functionality
Shops prioritizing value and reliability

Premium Repair Option: Aftermarket 1:1 OLED Screens

As aftermarket technology matured, manufacturers pushed toward a new goal: achieving a true OEM-like visual experience, which led to the development of the latest innovation: aftermarket 1:1 OLED screens.

REWA aftermarket 1:1 OLED screen replacement for Samsung Galaxy S22 Ultra next to its packaging

Unlike earlier OLED generations, these panels feature:

Narrower chins
True 1:1 viewing areas
True right-angled corner structures
OEM-like border proportions

Side-by-side comparison of phone screens highlighting the narrower bottom bezel on the 1:1 OLED display

Comparison of two smartphone screens showing the thicker bottom chin on the left versus the narrower chin on the right

According to REWA Lab testing, the latest third-party 1:1 OLED screens demonstrate virtually no noticeable difference from OEM screens in areas such as:

Under-display fingerprint sensor
S Pen pressure sensitivity
Display performance
Ambient light sensor

For repair professionals, this represents a major evolution in aftermarket display technology. Of course, newer technologies come with higher initial manufacturing costs. This generation of OLED displays cost highest than previous ones.

Best For:

High-end Samsung users
Customers sensitive to display quality
Professional refurbishing businesses
Repair shops pursuing OEM-like results

How to Choose the Right Samsung Aftermarket Screen

Different repair scenarios require different solutions. There is no universal “best” option.

Here’s a simplified comparison:

Comparison of Samsung Aftermarket Screens for S & Note Series

Collection	OEM Used	REWA Selected 1:1 Soft OLED	REWA Selected Aftermarket OLED	Others in the market
Display Size	Original	Original	Near OEM	Small Size
Display Panel	Soft OLED	Soft OLED	Soft OLED	Incell LCD
Display Performance	High Brightness, Wide Gamut, No Color Shift	High Brightness, Wider Gamut, Rich Saturation	High Brightness, Wider Gamut, Rich Saturation	Lower Brightness, Cool Color Tone
Battery Impact	Low	Medium	Medium	High
Fit & Finish	1:1 Fit Near; OEM bezel	Excellent Fit; Near OEM bezel	Great Fit; Narrow bezel	Light leakage may exist; Thick bezel
Resolution	FHD	FHD	FHD	HD
Refresh Rate	120Hz	90Hz	90Hz	60Hz
Touch Response	High-speed response; Supports S pen	Near OEM response; Supports S pen	Near OEM response; Supports S pen	Occasionally delayed response; Unsmooth S Pen
Compatible Models	Limited	Limited	Mainstream	Selective
Supply Stability	Constrained	Steady	Steady	Variable
Price Level	High & Unstable	Slightly High	Medium & Stable	Low, but high customer complaints
Target Use Case	OEM experience, premium resale & high-quality repair	1:1 OEM display size, reliable soft OLED alternative	OEM display performance, cost-effective & stable OLED replacement	No OEM display & touch needs
Overall Rating	☆☆☆	☆☆☆☆	☆☆☆☆☆	☆☆

Frequently Asked Question

What is the difference between Incell LCD and OLED screens?

Incell LCD screens use LCD technology with backlighting, while OLED screens use self-emitting pixels. OLED offers better blacks, higher contrast, and improved compatibility with Samsung flagship features.

Why does under-display fingerprint recognition not work on some aftermarket screens?

Most Incell LCD structures cannot support Samsung’s optical under-display fingerprint technology due to structural limitations.

What does “1:1 view area” mean?

It means a display structure designed to match the OEM screen’s active display size and border proportions.

Are aftermarket OLED screens good enough for daily use?

Yes. Modern aftermarket OLED screens now provide excellent display quality and support many original Samsung features, making them suitable for everyday users.

Why are 1:1 OLED screens more expensive?

They require higher-precision glass processing, improved panel engineering, and more advanced manufacturing standards.

Which aftermarket screen is best for repair shops?

It depends on the customer’s budget and expectations. Most repair shops benefit from offering multiple grades, including budget Incell LCD, mainstream OLED, and premium 1:1 OLED options.

Conclusion

From basic Incell LCDs to advanced 1:1 OLED panels, the aftermarket industry is rapidly narrowing the gap with OEM standards through continuous material innovation and engineering improvements.

REWA selected every tier of screen discussed above on the REWA Online Shop. And it has also obtained the CE certificate. As a global repair supply chain partner, every single display undergoes rigorous inbound and outbound inspection procedures by REWA to ensure it meets REWA strict QC standards.

Technician testing a smartphone screen next to stacks of REWA screen replacement boxes and repair tools

Over the 18 years, we are committed to powering your repair business with reliable and premium products and tailored customer solutions. If you have any questions, feel free to contact us.

June 9, 2026

How Samsung Aftermarket OLED Screens are Made?
When you’re planning a Samsung screen replacement, aftermarket OLED screens often stand out as the most cost-effective solution. But critical questions remain: how are these screens actually manufactured—and can their quality be trusted?

In this guide, REWA Tech takes you inside a professional production workflow to break down the full process of a Samsung aftermarket OLED screen step by step. This article will help you understand how high-quality aftermarket OLED screens are built—and what separates reliable products from low-grade ones.

What Is an OLED Screen?

Before diving into manufacturing, it’s essential to understand what an OLED screen consists of and how each component contributes to performance.

An OLED (Organic Light-Emitting Diode) screen is a complex module made up of multiple layers and precision components working together. Key parts include:
- Display Panel: The core light-emitting layer that produces light and images
- FPC (Flexible Printed Circuit): Connects the screen to the motherboard
- Driver IC: Controls display signals and image rendering
- Front Glass: The top protective layer protects the display and enables touch
- OCA (Optically Clear Adhesive): Bonds glass to the panel without affecting clarity
- Back Sticker: Secures the screen into the phone frame
- Fingerprint Module: Enables under-display fingerprint recognition
- Frame: Provides structural support and ensures proper installation
Simply put:
- Driver IC = “the brain” of the screen
- FPC = “the signal cable”
- OCA = “invisible glue for display clarity”
1. Driver IC Bonding and FPC Bonding: The Core Electrical Assembly

This stage is the foundation of screen functionality. Any error here directly affects display performance and touch response.

The process begins with polarizer lamination, where a polarizing layer is applied to the glass with precision tolerance controlled within 0.1mm. Then comes Driver IC bonding, a critical step where the chip is attached to the display panel using ACF (Anisotropic Conductive Film).

To ensure reliability:
- Plasma cleaning removes contaminants from bonding surfaces
- Automated dispensers apply ACF with high precision
- HD vision systems align components accurately
- Controlled heat and pressure secure the bond
Next is FPC bonding, which connects the display to the device motherboard. Similar cleaning, alignment, and bonding processes are applied to ensure a stable electrical connection.

After bonding:
- Anti-oxidation adhesive protects connection points
- Manual inspection ensures no defects
- Power-on testing verifies touch responsiveness
Finally, laser cutting shapes the display with 1:1 accuracy, ensuring:
- Perfect camera hole alignment
- Correct corner curvature
- Seamless fit into the phone frame
2. Glass–OCA–Display Lamination: Achieving Visual Clarity

This lamination part determines the visual quality of the screen—clarity, brightness, and absence of defects.

The process takes place in a dust-free cleanroom, because even microscopic particles can cause display issues.

Steps include:
1. Glass inspection under high-intensity light to detect scratches or contamination
2. OCA application to ensure optical transparency
3. Vacuum lamination, aligning glass and panel precisely
After lamination:
- Screens undergo autoclaving (high pressure + heat) to eliminate micro-bubbles
- Manual inspection ensures zero bubbles and perfect adhesion
Important note:
“Bubbles” are not just cosmetic—they can affect touch sensitivity and display uniformity.

Next steps:
- Back sticker is applied using robotic arms
- FPC is secured and routed to avoid stress damage
- Protective films are added
A full touch-function test ensures: No dead zones + No “ghost touches”, setting the baseline for REWA’s high-quality screens. At this stage, only fully functional, bubble-free displays move forward.

3. Module & Frame Assembly: Completing the Screen Structure

This stage focuses on integrating functional modules and finalizing the physical structure.

Samsung Galaxy S Series & Samsung Note Series and selected models of A Series feature intelligent under-display fingerprint sensor, thus biometric security is paramount. The fingerprint module is installed:
- Optical adhesive ensures proper signal transmission
- Precise OLED alignment guarantees accurate recognition
Next comes fingerprint recognition and S Pen response test.

Next is frame assembly:
- Automated dispensing applies adhesive along original design paths
- Ensures proper sealing and structural integrity
- Guarantees a flush fit with the phone body
The final protective film is applied to complete assembly, creating a fully finished, durable screen.

4. Independent Quality Verification: What Makes REWA Selected Screens Different

Production alone does not guarantee quality. This is where independent verification in REWA laboratory becomes critical.

Each batch undergoes:
- Secondary full-scale testing
- Functional validation (display + touch + biometrics)
- Strict defect screening
Only screens that pass this rigorous verification can earn the REWA seal of approval.

Key insight:
The difference between “average” and “premium” third-party screens often lies in post-production quality control, not just manufacturing.

Frequently Asked Questions

Are aftermarket OLED screens as good as original ones?
High-quality aftermarket OLED screens can achieve performance close to original displays, especially when manufactured with precise bonding and strict quality control.
What is ACF and why is it important?
ACF (Anisotropic Conductive Film) is a special adhesive that allows electrical connections only in specific directions, ensuring stable signal transmission between components.
Why is dust control important during lamination?
Even tiny dust particles can cause bubbles, display defects, or touch issues. Cleanroom environments ensure high visual quality.
What causes “ghost touch” problems?
Ghost touch is usually caused by poor bonding, defective FPC connections, or low-quality materials affecting signal transmission.
How can I identify a high-quality Samsung aftermarket screen?
Look for:
Stable touch performance
No bubbles or display defects
Accurate fit (1:1 with original)
Under-display fingerprint recognition
Verified testing or certification
Why is the Driver IC bonding process critical?
It directly controls how the screen displays images. Poor bonding can lead to flickering, lines, or complete display failure.
Do Samsung third-party screens support fingerprint functionality?
Yes, but only if the fingerprint module is properly installed and calibrated during assembly.

Conclusion

Understanding how Samsung aftermarket OLED screens are made reveals an important truth: quality depends on process precision and testing standards—not just cost.

From IC bonding and cleanroom lamination to final assembly and independent verification, every step plays a role in determining performance and reliability.

At REWA, there is a strict Quality Control Line to block products that do not meet 4S standards. Over the 18 years, we are committed to powering your repair business with reliable and premium products and tailored customer solutions. If you have any questions, feel free to contact us.
March 27, 2026
How to Refurbish Samsung Galaxy Z Flip4: Complete Screen & Mid-Frame Restoration Guide
Foldable smartphones like the Samsung Galaxy Z Flip4 are revolutionary — but also delicate. A cracked back cover, hinge damage, or screen issues like yellow tinting can ruin both functionality and appearance. Fortunately, these issues don’t mean you need a new device.

In this comprehensive refurbishment guide, we’ll walk you through the step-by-step process to restore a damaged Samsung Z Flip4, addressing a yellow-tinted screen, replacing the back cover, and repairing the mid-frame. Whether you’re a repair technician, DIY enthusiast, or running a repair shop, this tutorial will help you transform a broken foldable into a like-new device.

Step-by-Step Samsung Z Flip4 Refurbishment Process

1. Initial Screen Testing
- Turn on the device. Dial *#0*#
- Check touch response and display functionality.
- If both work normally despite screen tint, proceed with refurbishment.
2. Remove the Back Cover
1. Power off the phone.
2. Place the phone on a heating pad set to 90°C (194°F) for 5 minutes.
3. Insert an entry pick along the back cover gap and apply isopropyl alcohol.
4. Slide toward the center hinge area using an opening card.
5. Repeat the process for the upper back cover.
Important: Disconnect the back cover flex cable before fully removing the back.

3. Internal Disassembly
- Apply a camera lens protective sticker.
- Unscrew all metal plates.
- Disconnect:
  - Battery flex cable
  - Hinge flex cable
  - Wireless charging coil
  - Bridge flex cable
- Remove:
  - Front camera
  - SIM card tray
  - Motherboard
  - Charging port
  - Speaker assembly
4. Screen Disassembly
- Reheat the screen area.
- Use IPA and spudger to lift the support frame and remove clips.
- Insert an opening card — avoid cutting the display flex cable at the bottom.
- Peel off adhesive and proceed carefully.
5. Clean Screen Components
- Place the screen on a separator and use electronic glue remover.
- Clean with isopropyl alcohol, sponge, and lint-free cloth.
6. Replace the Damaged Polarizer
1. Insert 0.028mm cutting wire to remove the outer CPI film.
2. Clean again.
3. Use cutting wire to remove the polarizer — keep tension even and parallel.
4. Clean surface with specialty solution and cloth.
7. Apply New Polarizer & Laminate
- Place screen in alignment mold.
- Apply new inner film with polarizer layer.
- Laminate and perform bubble removal.
8. Reassemble the Device

Mid-Frame Restoration
- Pry up both batteries using IPA and blade (carefully).
- Remove power button, speaker, hinge, waterproof strip, and hinge flex cable.
- Clean hinge and install components onto the new mid-frame.
- Test foldability before final connections.
Final Assembly
- Reinstall:
  - Motherboard
  - Front camera
  - Wireless charging coil
  - Charging port module
- Apply screen adhesive, bond screen to mid-frame gently.
- Use frame adhesive for support frame and clips.
- Secure with tape until bonded.
- Apply sealing tape on back cover, remove lens film, and reattach back cover.
9. Final Testing

Power on the phone and verify:
- Screen works correctly
- Touch is responsive
- Folding mechanism functions smoothly
The Samsung Galaxy Z Flip4 has been successfully refurbished!

Tools & Parts List

Tools Used:
- Heating pad (90°C)
- Entry pick & opening card
- Isopropyl alcohol (IPA)
- Spudger, tweezers, screwdrivers
- Lint-free cloth, sponge
- Electronic glue remover
- Separation machine, cutting wire
- Alignment mold, laminator, bubble remover
- Protective stickers, adhesive tapes
Replacement Parts:
- New mid-frame
- Inner film with polarizer
- Back cover
- Hinge flex cable
- Waterproof strip
Glossary of Terms
- Polarizer: Controls light direction in the display. Damaged polarizers cause discoloration like yellow tinting.
- CPI Film: A transparent layer protecting the flexible screen surface.
- Lamination: Bonding display layers using pressure and heat.
- Hinge Flex Cable: Sends signals across the folding hinge. A common failure point in foldable phones.
Repair Key Points:
- When separating the bottom screen, do not slide the opening card all the way down. A display flex cable lies at the bottom. Stop at the position shown on the screen.
- When separating the inner film (polarizer with UTG) from the display layer, it is recommended to use a 0.028mm cutting wire, pulling gently to avoid damaging the display layer.
- The hinge flex cable is fragile; handle it carefully during removal and installation to prevent irreversible damage.
Conclusion

Refurbish Samsung Galaxy Z Flip4 isn’t just possible — it’s practical and rewarding. By carefully replacing the polarizer and back cover, restoring the hinge, and reassembling the phone step-by-step, you can turn a damaged device into a like-new foldable phone.

Whether you’re a repair shop technician or advanced DIYer, this guide will save costs, reduce e-waste, and improve repair confidence. Be sure to test all functions post-assembly for the best result.

Tips & Resources
- 🔗 Check our YouTube channel for the hinge flex cable repair video.
- 📸 Add repair images or video snippets for better clarity.
- 🕒 Estimated repair time: 2–3 hours | Difficulty: 🔧🔧🔧🔧 (Advanced)
July 9, 2025

Samsung Screen Comparison: OEM, OLED, and INCELL

Since 2023, aftermarket demand for Android screens has skyrocketed, especially for Samsung’s premium N and S series devices. To address this rising demand, REWA has introduced a comprehensive range of Samsung screens including the A, J, M, N, and S series. We aim to help customers find the most suitable replacement screen tailored to their needs.

There are three main types of replacement screens on the market: OEM Refurbished Screens, Aftermarket OLED Screens, and Aftermarket Incell Screens. Each of these options varies in performance across key aspects such as color, resolution, and touch response. In this blog, we’ll test Samsung S20 screens and explore these differences through four core tests, providing a detailed analysis to guide your decision-making process.

Note: Before reading this blog, you can also watch this video with the same topic.

Overview of the Three Screen Types: Pros and Cons

OEM Refurbished Screens

These screens are removed from original devices and retain most of their original components, with only the front glass or flex cable replaced when necessary. While minor signs of aging may be present, REWA meticulously inspects and eliminates such imperfections, making these screens an excellent choice for users seeking high quality.

Aftermarket OLED Screens

Manufactured by third-party factories, these screens adopt OLED technology, delivering impressive brightness and contrast. However, some models may require a dedicated frame due to design incompatibility with the original frame.

Aftermarket Incell Screens

Incell screens are flat-panel designs with slightly wider bottom bezels, reducing the viewing area and lacking features like fingerprint-on-display (FoD). While the overall performance is modest, these screens offer a cost-effective solution for budget-conscious users.

samsung screen comparison oem oled incell figure 1024x576 2 — *Figure 3. INCELL Screen*

Four Core Tests: Analyzing Performance in Depth

To provide a comprehensive comparison, we evaluated the three screen types based on color reproduction, brightness, color gamut, resolution, and touch performance. Here’s what we found:

1. Color Reproduction: Natural vs. Vibrant

Color reproduction significantly impacts user experience and screen quality perception.

The OEM Refurbished Screen delivers natural and realistic colors, closely resembling what the human eye perceives, making them ideal for users who value high accuracy.

The Aftermarket OLED Screen exhibits cooler tones with more vibrant and saturated colors. These screens appeal to users who prefer vivid visuals, though prolonged use may cause eye strain.

The Aftermarket Incell Screen has dimmer tones and lower contrast, leading to a noticeable loss of detail, especially in darker regions. This makes them less suitable for scenarios requiring high-quality displays.

2. Brightness and Color Gamut: How Bright and Colorful?

Brightness and color gamut determine how well a screen performs in various lighting conditions and its ability to display a broad color range.

The OEM Refurbished Screen achieves a brightness of 394.45 nits and a color gamut coverage of 106.6%, balancing both brightness and vividness for versatile use.

The Aftermarket OLED Screen offers 364.60 nits of brightness and a slightly higher color gamut coverage of 110.9%, displaying a richer range of colors.

The Aftermarket Incell Screen falls behind with only 203.13 nits of brightness and 70.4% color gamut coverage, making it less suitable for environments with high ambient light.

3. Resolution and Pixel Arrangement: A Test of Clarity

Using a microscope, we examined the pixel arrangements to evaluate clarity:

The OEM Refurbished Screen features Samsung’s diamond pixel arrangement, providing superior pixel density and clarity.

The Aftermarket OLED Screen utilizes TCL CSOT’s proprietary pixel arrangement, delivering decent clarity but slightly trailing the OEM screen.

The Aftermarket Incell Screen has a standard RGB arrangement, offering moderate clarity that is sufficient for basic needs.

4. Touch Performance: Precision and Responsiveness

Touch performance is critical for interaction and determines the screen’s usability.

The OEM Refurbished Screen delivers precise and responsive touch functionality with consistent performance across the entire screen, making it perfect for users with high interaction demands.

The Aftermarket OLED Screen is slightly slower in response but maintains good touch accuracy, meeting most daily requirements.

The Aftermarket Incell Screen shows minor lag and less precise touch input. While this may not be noticeable without a direct comparison, it could impact tasks requiring high precision.

Which Screen Is Right for You?

Summary of the differences:

Screen Type	OEM Refurbished OLED	Aftermarket OLED	Aftermarket Incell
Display	★★★★★	★★★★	★★★
View Window	Original	Similar to original	Thick chin
Installment Thickness	Original	Similar to original	Thick
Price	High	Medium	Low

Based on the tests, it’s clear that each screen type has its strengths and suits different needs:

For display and view windows, OEM Refurbished Screens are the top choice, excelling in all key areas.

For value-conscious users, Aftermarket OLED Screens provide excellent view windows and installment thickness at a competitive price.

For budget-focused users, Aftermarket Incell Screens offers basic functionality at an affordable cost, making them a practical option for limited budgets.

Conclusion: Make an Informed Decision

Choosing the right screen whether it’s a Samsung screen, iphone screen or other is about balancing performance, budget, and end-customers’ preferences. By understanding the differences between OEM Refurbished Screens, Aftermarket OLED Screens, and Aftermarket Incell Screens, you can confidently select the one that best suits your business.

At REWA, we’re here to provide expert advice and high-quality products to ensure you make the best choice. If you have any questions, feel free to contact us.

November 25, 2024

REWA New Website Released: Power Your Repair Business

We are pleased to announce that REWA Tech official website has been upgraded! This update is tailored for B2B phone repair enterprise users. Not only has it been upgraded in visual design, but it also offers more product and service information. This will help you stand out from the repair industry competition.

Rich product and service information

As a phone parts wholesale supplier, we have updated the display page of products and services to provide a more detailed overview of solutions, allowing you to find the solution that best meets your business needs.
Check details: https://rewawp.iamtareq.com/product/

New UI design

By adopting a modern design style, it offers a more professional and concise browsing experience. Enjoy smooth navigation and visual enjoyment whether you are searching for information or exploring solutions.

Improve user experience

By optimizing the content layout and website architecture, the browsing experience on mobile devices is also greatly enhanced. This helps you access the website more efficiently anytime, anywhere and make business decisions.

Why choose REWA?

As a leader in one-stop repair business solutions, REWA Tech has always been committed to providing customers with the most complete solutions through screen assemblies, batteries, small parts, repair and refurbishment products and technical support. This includes training services, pre-sales and after-sales services. Additionally, we have updated our website to reflect our brand upgrade and our latest understanding of customer needs.

Explore Now

Visit REWA Tech Official Website now to explore new repair business solutions!
We sincerely invite you to visit the new official website to experience the new design and functions. If you have questions or feedback, please feel free to contact us. We look forward to working with you to jointly drive your business to success.

September 4, 2024
Samsung vs Apple: A Closer Look at the 2020 Flagship Mobile Phones

The release of the Samsung Galaxy Note 10 and iPhone 11 Pro has brought an end to the battle of the 2019 flagship mobile phones.

If 2017-2018 is the time of full-screen display, then 2019 – 2020 is the time of 5G.

The leaked info of next year’s iPhone and Samsung has seen a huge change on the two flagship mobile phones, including design, hardware, etc.

Let’s take a look at it now.

Qualcomm has already released the snapdragon 865 5G processor and brought us numerous features.

One of the major changes is Dolby Vision which can dynamically adjust an image’s color settings to prevent the image from looking too dim or bright.

In the meantime, the processor also supports 200-megapixel cameras for better digital zoom, 960 FPS super-slow-motion video recording, and even 8K video as well.

Thus the early leakage predicted that Samsung S11 will have unbelievable improvement on its camera parts while the develop code is Picasso.

Previously, Samsung officially unveiled the 108MP ISCOCELL Bright HMX camera sensor in August.

In October, the leakage design also unveiled the secret of Samsung S11’s back camera and it seems that the phone will have around five “eyes” with a strange design.

Everything looks just fine except for the camera.

Samsung S11 Concep

Thus the early leakage predicted that Samsung S11 will have unbelievable improvement on its camera parts while the develop code is Picasso.

Previously, Samsung officially unveiled the 108MP ISCOCELL Bright HMX camera sensor in August.

In October, the leakage design also unveiled the secret of Samsung S11’s back camera and it seems that the phone will have around five “eyes” with a strange design.

Everything looks just fine except for the camera.

I thought Samsung was just joking whereas they were serious about it.

Samsung S11 comes with a large camera that integrates five individual camera sensors.

It is bound to be a powerful photography device.

In the meantime, the new system leakage screenshot proves that the new S11 will have a 120hz fresh rate setting option.

Together with the advanced 2K dynamic display with a crazy fresh rate, the Samsung S11 is supposed to be a phone with the best visual effect in 2020.

Thanks for watching…oh, there is one more thing.

What about the iPhone 12?

After Apple compromised the lawsuit with Qualcomm, Apple finally got the chance to produce a 5G phone in 2020.

It seems Apple will release six iPhones in 2020 including iPhone SE2, iPhone 12 4G, iPhone 12 4G Plus, iPhone 12 4G Pro Plus, iPhone 12 5G Pro Plus, and iPhone Pro Max 5G.

Right now have two common rumors about the design.

One predicted that the notch will be a bit narrower than before and Apple will fix it to reach a real full display in 2021.

Another opinion is that the new iPhone will use iPad Pro’s Face ID solution to fix the notch issue.

Both opinions believe the iPhone 12 will reuse the metal bezel.

Now, let’s move to hardware, it seems all the iPhone 12 series will come with an OLED screen and triple camera & TOF camera as well.

All phones will come with the A14 Bionic processor while the iPhone 12 Pro series will come with Super Retina XDR display.

iPhone 12’s main direction is to make a huge improvement in 5G, camera parts, and the stability of iOS.

There are a variety of bugs in iOS 13 and Apple has released so many patch versions to fix different issues.

Apple has already claimed that they will take the stability of the system as the main direction of iOS 14.

No matter how Samsung and Apple gonna change, 2020 definitely will be the new time for mobile phones.

Which one will you choose next year? Samsung or iPhone?

Leave your opinion in the comment below.

December 7, 2023
Samsung A53 Won’t Turn On Repair

The Samsung A53 model is widely recognized as one of the most desirable smartphones currently available. However, like all electronic devices, it is susceptible to occasional operational issues that may prove difficult and frustrating for users. One of the most common problems experienced by users pertains to the device’s failure to turn on, leading to numerous inquiries directed at REWA Tech via email.

While there could be several reasons why a Samsung A53 may not turn on, REWA Tech is committed to providing comprehensive solutions to such problems. Our technical team has developed a step-by-step guide to aid users in troubleshooting and resolving this issue.

Initial Troubleshooting Steps

Check the Battery

Ensure that your phone’s battery is charged. If your phone shows no signs of charging when connected to a charger, try using a different cable and charger to rule out a faulty charging setup.

Soft Reset

Sometimes, a soft reset can resolve the issue. Press and hold the power button along with the volume down button for about 10 seconds. This can sometimes force the phone to restart if the issue is software-related.

Advanced Troubleshooting:

Primary Testing

To begin, test the device by pressing the power button. If the device does not turn on, plug in the charging cable to charge the phone. If the phone remains unresponsive, the device will need to be disassembled for further testing.

Next, we need to get the phone disassembled for further test

Place the phone back down on the heating pad at 100℃ for about 2 minutes, then get a gap with an opening card. Add some alcohol to facilitate separation.

Detach the back cover, and remove the screws that secure the motherboard shielding cover.

Disconnect the flex cables, take the motherboard out and remove the cameras with the ESD spudger.

Check the motherboard

Power the motherboard with a direct current supply and trigger the boot process with tweezers, the boot current is 0.

Then continue to measure with a multimeter, connect the black probe to the ground and use the red probe for measurement, the voltage is 0.

Next, protect the motherboard with high-temperature tape, and remove the shielding cover with a hot air gun at 380℃. Measure the diode values of the components around the power IC, the diode values are OK.

It can be judged that the power IC is faulty. Then let’s try to replace the power IC.

Power IC replacement process

Protect the components and chips around the power IC with high-temperature tape, and apply a little bit of solder paste flux. Then heat the IC with a hot air gun at 380℃ and airflow 3.

After removing the IC apply some paste flux to the bonding pads, use a soldering iron at 380℃ and solder wick to remove the tin. Clean the bonding pads with PCB cleaner when the tin is removed.

The next step, let’s reball the bonding pads of the power IC. Apply the tin paste on the bonding pads with stencil evenly then heat with a hot air gun to form the solder balls at 320℃.

Apply solder paste on the PCB and align the IC at the proper place, then solder the IC with a hot air gun at 320℃ and airflow 3.

Clean the motherboard with PCB cleaner and cool it down, then measure with a multimeter, the voltage return to normal, trigger the boot-up with tweezers, and the boot current is also normal.

Then we put back the shielding cover and the cameras and install the motherboard. Press the power button and the phone turns on normally.

Assemble the phone and test the functions again

Apply bezel glue and assemble the phone screen with a clamp fixture. Then test all the functions again, and the phone works normally. The issue gets resolved by power IC replacement.

Visit REWA Youtube Channel to watch the detailed operation process

Frequently Asked Questions

How to Fix a Samsung Phone that won’t Turn on?
An issue with the motherboard chip level causes the issue, which requires excellent repair skills and knowledge, as well as professional tools and equipment. It is recommended that you send it back to the official repair center for repair. If your device is out of warranty already and you don’t want to spend a lot on repairing it, ask a local repair shop for assistance.
How can I Become a Cell Phone Technician?
In order to become a cell phone repair technician, you’ll have to learn the device structure, and how to use repair tools, and the key skill is excellent handwork, replacing parts without damaging the motherboard.

A cell phone repair course at REWA Academy is the best way to acquire cell phone repair expertise and skills. We have everything you need to be a cell phone repair technician who can earn a decent living.

There are three types of training we offer on-site, off-site, and live training. A professional team of trainers and technicians with more than ten years of experience will help you to become a service expert in no time.

Conclusion

Repairing a smartphone requires a methodical approach to identifying and solving the underlying issue. Whether it’s a simple fix like charging your phone with a different charger or a complex repair like replacing the power IC, understanding the problem is the first step toward resolution.

November 11, 2022
How to Fix Samsung S10 Touch Screen Not Working

REWA Academy recently launched online Android Phone Motherboard Repair Courses. For $129 a year, you can learn the workflow and troubleshooting process for different Android phone motherboards like Samsung, Huawei, Xiaomi, etc. The workflow and troubleshooting process learned can be effectively applied to solve problems in real repair circumstances. Today we will make use of Android course content from REWA Academy to deal with a real repair case of Samsung S10 touch screen not working.

December 8, 2021
REWA Testing Center – Samsung Galaxy S5 Glass Lens Testing, What’s A Good Glass Lens Mean ?

This video will guide you to REWA Testing Center, where professional engaged in mobile phone parts testing. This video will tell you the testing course for Samsung Galaxy S5 glass lens,

more testing videos will continue to be launched. Please keep sustained attention on our website https://shop.rewa.tech/ to get the latest news.

December 6, 2021
Troubleshooting Samsung S10 Touch Issues: A Step-by-Step Guide

Are you having trouble with your Samsung S10’s touchscreen? You’re not the only one. Although it’s one of the most sought-after smartphones on the market, some users have reported issues with the touchscreen. But fret not, we have you covered. This guide includes detailed step-by-step instructions on how to troubleshoot the issue.

The new online courses offered by REWA Academy focus on repairing Android phone motherboards. These courses cover various brands such as Samsung, Huawei, Xiaomi, and more. Students will learn the step-by-step workflow and troubleshooting techniques that can be directly applied to real repair scenarios. In this instance, we will utilize the Android course content from REWA Academy to address a specific repair case involving the Samsung S10 model.

Diagnosing the Problem

Upon turning on the Samsung S10, it becomes evident that the touch screen isn’t functioning. Even after replacing the screen, the issue persists, pointing to a possible motherboard fault as the culprit.

To get to the root of the problem, we need to remove the motherboard for further testing. Here’s a breakdown of the steps.

1. Detach the Back Cover: Start by gently removing the back cover of the phone.

3. Protect the Camera: To safeguard the camera during the repair, apply high-temperature tape over it.

2. Remove Screws and Cover: Carefully take out the screws securing the motherboard and the cover that holds it in place.

4. Disconnect Components: Begin by disconnecting the battery flex cable and removing the front camera.

5. Disconnect the Display: Next, disconnect the display flex cable.

6. Remove the Motherboard: Carefully extract the motherboard from the phone.

7. Yank the Rear Camera Module: Lastly, remove the rear camera module to avoid any damage during the repair process.

Understanding the Components

Before diving into the repair, it’s essential to understand the key components related to the touch functionality of the Samsung S10. As per the REWA Academy course, these components include:

– HEA12000: The display and touch connector that links the screen to the motherboard.

– U12019: Supplies touch with 3.3 V and 1.8 V voltages.

– UCP5000: Responsible for communication between the screen and touch.

Troubleshooting the Faulty Component

To isolate the issue, we first measured the diode value of HEA12000. Normally, it should read around 600, but in this case, it shows 1 (infinite).

Upon inspection, we find that pin 42 of HEA12000 connects to C12022 and L12010, eventually leading to U12019.

After measurement by the multimeter, The diode value of L12010 is also 1 (infinite), indicating a problem with the inductor or related circuits. Then we remove corner adhesive with Hot Air Gun at 250 °C and airflow 3. We can see that the inductor is completely damaged.

Confirmation of the Issue

To verify that the power IC’s output voltage is normal, we connect the battery and turn on the phone. We measure one end of the inductor and find a voltage of about 3.3 V instantly. We also check the 1.8 V power supply of pin 38, which jumps to 1.5 V instantaneously. This confirms that both output voltages of U12019 are functioning correctly, affirming that the open-circuited inductor is the cause of the touch issue.

Then measure the 1.8 V power supply of pin 38 to see if it is normal. The startup voltage jumps to 1.5 V instantaneously. It indicates the two output voltages of U12019 are working fine. We can confirm now that the open-circuited inductor has resulted in the touch not working.

Repair and Testing

After identifying the problem, we replaced the defective inductor with a fresh one. Add Paste Flux to the bonding pads, then use a Soldering Iron at 380 °C to clean them. Continuously clean the bonding pads with PCB Cleaner.

Use a Hot Air Gun to solder a new inductor at 330 °C with airflow 3. After soldering, clean the bonding pads with PCB Cleaner. Proceed to measure the diode values of both the inductor and capacitor, which are found to be normal. Finally, measure the diode value of the connector, which is also normal.

After reassembling the phone, touch functionality is restored, bringing the Samsung S10 back to life.

Conclusion

Keeping up with the latest advancements and information in the ever-evolving sphere of smartphone repair is vital. At REWA Academy, we offer advanced courses for various Android phone models, providing you with the essential abilities and proficiency to tackle any repair job. Furthermore, when you subscribe to REWA Academy, you will receive complimentary access to newly added tutorials for the duration of your subscription.

November 22, 2021
Dual SIM & SD Card Work Simultaneously on Samsung Galaxy S7 Edge

Warm Prompt:

1.Attention that you may break your SIM card, Micro SD card and/or Galaxy S7 Edge by these instructions.

2.Skilled technician is required for the operations.

3. This video is only for technique sharing.

4. The device in the video is dual-SIM card version Samsung S7 edge

Those who need the dual SIM cards on their device might have been disappointed with the Samsung Galaxy S7 Edge. Because you can either choose Extra Space; or Dual Sim with internal space.

October 22, 2021
Replace the Charging Port of Samsung S10

The Type-C port of the Samsung S10 is damaged. Check out this video to see how we replaced the charging port of the Samsung S10.

October 20, 2021