Fix iPhone 13 Face ID Not Working | 2023

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 If you are an iPhone 13 user experiencing issues with your Face ID not working, don't worry - you are not alone. However, there is a solution to this problem that you can try. In this article, we will guide you through the steps to fix iPhone 13 Face ID not working.

What causes the issue?

The issue of iPhone 13 Face ID not working may arise after a screen replacement. This is because the chip on the original screen has saved Face ID data. The transfer of this chip to the new screen might solve the problem.

Steps to Fix iPhone 13 Face ID Not Working

Before you begin, ensure that you have all the necessary tools required for this procedure. These include a hot air gun, soldering iron, solder wick, and PCB cleaner, among others. Here's how to fix iPhone 13 Face ID not working:

Step 1: Test Face ID Function

Firstly, test the Face ID function of your iPhone 13. True Tone function should be normal, and Face ID can be set up and working fine.

Step 2: Replace Screen

Disassemble your phone and replace the screen with an original genuine one. Remove the original screen carefully.

Step 3: Detach Sensor Flex Cable

Detach the sensor flex cable with Hot Air Gun at 100 °C. Be careful not to damage the flex cable when you remove it.

Step 4: "Important Display Message" Appears

After attaching the removed sensor flex cable to the new screen, install screws and connect the new screen. Upon turning on the phone, an "Important Display Message" appears, and Face ID cannot be set up. True Tone disappears.

Step 5: Transfer IC Chip

To transfer the IC on the original screen to the new screen, remove the new screen. Apply a protective film to the screen to prevent scratches.

Heat the screen flex cable with Hot Air Gun at 100 °C and gently pull up the flex cable. Insert the reballing stencil under the flex cable for insulation, protecting the screen.

Step 6: Apply High-Temperature Tape

Apply high-temperature tape. Remove black adhesive around the chip with Hot Air Gun at 240 °C. To remove the chip, set the temperature to 300 °C and airflow to 6.

Step 7: Apply Middle-Temperature Solder Paste

Apply some middle-temperature solder paste. Clean the bonding pads with a soldering iron at 360 °C and solder wick. Keep cleaning the bonding pads with PCB cleaner.

Step 8: Reball the Chip

Remove the chip on the original screen with the same method. Clean tin on the chip of the original screen. Apply some middle-temperature solder paste to the bonding pads. Clean tin and black adhesive on the bonding pads of the chip with solder wick. Keep cleaning the bonding pads with PCB cleaner.

Reball the chip by putting the reballing stencil in position and applying a layer of middle-temperature solder paste evenly.

Step 9: Solder the Chip

After the solder balls are formed, clean them with PCB cleaner. Apply Paste Flux to the bonding pads of the new screen. Align the chip of the original screen. Solder the chip with Hot Air Gun at 300 °C. Remove high-temperature tape after the flex cable has cooled.

Step 10: Connect Screen and Turn on Phone

Connect the screen, turn on the phone, and voila - there is no "Important Display Message." Face ID can be set up and working fine. However, True Tone may not be restored yet.

Conclusion

We hope that these steps will help you fix your iPhone 13 Face ID not working issue. It is important to note that this procedure should only be carried out by a professional or someone with experience in phone repairs. Good luck!

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