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Troubleshooting Samsung A20s Wi-Fi and Bluetooth Issues: Solutions and Fixes

Samsung A20s Wi-Fi and Bluetooth Issues

Introduction: Understanding the Common Problems with Samsung A20s Wi-Fi and Bluetooth

Samsung A20s is a popular smartphone model known for its sleek design and impressive features. However, some users have encountered issues with the device's Wi-Fi and Bluetooth functionality. In this article, we will delve into the possible causes of these problems and provide effective solutions to help you resolve them. If you are currently facing similar issues with your Samsung A20s, read on to find out how to fix them.

1. Possible Causes of Wi-Fi and Bluetooth Malfunctions

When it comes to pinpointing the exact causes of Wi-Fi and Bluetooth malfunctions on the Samsung A20s, it can be challenging as these issues often occur suddenly. However, based on cases we have encountered at our service center, we have observed that these problems are inherent to the device itself. Users have reported that their smartphones were being used normally, without any incidents such as drops, water damage, hard resets, or flashing prior to the issues. Consequently, we can conclude that the "Samsung A20s Wi-Fi and Bluetooth not working" problem is primarily caused by a preexisting hardware issue. In fact, every Samsung A20s device we have examined at our service center has displayed damage to the Wi-Fi and Bluetooth IC (Integrated Circuit). The IC used in these devices is the WCN3615, and it is responsible for both Wi-Fi and Bluetooth functions.

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2. Other Devices Utilizing the WCN3615 IC

If you are looking for devices that share the same Wi-Fi and Bluetooth IC as the Samsung A20s, you can find the WCN3615 IC in other smartphone models, such as:

  • Redmi 3X
  • Redmi 3S/3S PRO
  • Redmi 4A
  • Redmi Note 5a

These Xiaomi devices feature the same IC, indicating a commonality in hardware components.

3. Resolving Wi-Fi and Bluetooth Issues on Samsung A20s

Resolving these Wi-Fi and Bluetooth issues on the Samsung A20s requires the expertise of a skilled smartphone technician with experience in hardware repairs. Given that the root cause is a malfunctioning Wi-Fi and Bluetooth IC, we advise against attempting repairs unless you have prior experience replacing IC components on mobile devices. Inexperienced attempts to replace the IC may lead to further complications.

Steps to Replace the WCN3615 IC on Samsung A20s

To replace the WCN3615 IC on the Samsung A20s, follow these steps carefully:

  1. Begin by removing the back cover of the Samsung A20s, taking care not to scratch or crack it as it is attached with adhesive.
  2. Remove all screws and detach the mainboard, ensuring you disconnect the camera and fingerprint modules beforehand.
  3. Secure the mainboard with a PCB holder. Exercise caution when securing it to avoid any contact between the PCB holder and components such as resistors and capacitors.
  4. Use a blower to remove the metal shield, as shown in the image above. Adjust the blower settings according to your preference. I typically set my blower to 350 degrees Celsius with a fan speed of 3. Remember, each blower may have different settings, so consult the user manual for optimal settings.
  5. Apply flux to the WCN3615 IC and use the pre-set blower to lift the IC carefully.
  6. Once the IC is lifted, let it cool for a moment, then clean off any remaining flux using isopropyl alcohol (IPA) or other suitable PCB cleaning solutions. If unavailable, you can use gasoline as an alternative.
  7. Level the solder attached to the Samsung A20s mainboard using a soldering iron, avoiding the need to clean it with solder wick. Simply spread the solder evenly. Remember to apply flux to ensure proper solder distribution.
  8. Clean the PCB again using a cleaning solution.
  9. Install the new IC with precision, as the WCN3615 is a glass IC that is relatively easy to install.
  10. Reassemble all the components and power on the device.
  11. Once Wi-Fi and Bluetooth functionality are restored, congratulations! You have successfully resolved the issue.
  12. Reattach the back cover, applying adhesive to secure the LCD.
  13. Done!

Conclusion: Resolving Samsung A20s Wi-Fi and Bluetooth Issues

In conclusion, this article has provided insights into troubleshooting and resolving the "Samsung A20s Wi-Fi and Bluetooth not working" problem. By understanding the underlying causes and following the steps outlined above, you can overcome these issues with the right expertise. We hope that the information shared here has expanded your knowledge and will help you address Wi-Fi and Bluetooth malfunctions on the Samsung A20s. Thank you for reading!

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