iPhone 12 and Above Models WiFi Chip Repair: A Step-by-Step Guide

For years, independent repair shops faced a significant challenge with Wi-Fi repairs on iPhone 12 and later models due to Apple’s part pairing system. However, a groundbreaking solution has emerged, allowing us to perform Wi-Fi repairs on iPhones like the iPhone 13 for the first time. In this guide, we will walk you through the entire process of iPhone WiFi chip repair, ensuring you have all the information you need to successfully complete the task.

Step 1: Preparation for Disassembly

In order to complete the repair successfully, you must prepare your workspace and gather the necessary tools.
Here are the things you will need:

1. RS50 Mobile Phone Opener & Clamp Fixture
2. REFOX RS3 3D Screw Driver Set
3. BGA Flux Paste
4. 3 in 1 Knife Handle & Blade Repair Set
5. Desoldering Platform
6. MaAnt T1 Universal PCB Holder
7. SUGON 8650 Pro Hot Air Station
8. iBoot A iPhone Power Cable
9. REFOX RS30 ESD Phone Repair Heating Pad
10. Tin Planting Platform
11. SUGON AIFEN A902 Soldering Station
12. BEST 0.6mm Solder Wire

With your tools ready, let’s begin the disassembly of the iPhone 13.

Step 2: Disassemble the iPhone

Start by carefully disassembling the iPhone. Follow these steps:

1. Cover the cameras with protection stickers to prevent scratches.
2. Remove the motherboard and split it gently.

Once the motherboard is out, it’s time to test the circuits associated with the Wi-Fi module.

Step 3: Testing the Wi-Fi Module

After disassembling the iPhone, the next step is to test the circuits related to the Wi-Fi module. This is crucial to verify that they are functioning properly.

Since the Wi-Fi serial number (SN) cannot be obtained simply by connecting the iPhone to programming software, we will remove the NAND chip to read the Wi-Fi SN from there.

Step 4: Remove the NAND Chip

To access the Wi-Fi SN, follow these steps:

1. Heat the NAND chip evenly with a hot air gun at 420°C and airflow set to 80.
2. Carefully pry the NAND chip up.
3. Apply some flux to the soldering pad of the NAND chip.
4. Remove the tins from the soldering pad using braid and a soldering iron.

Step 5: Read the Wi-Fi SN

Now that the NAND chip is removed, we will use a Luban programmer to read the Wi-Fi SN:

1. Place the NAND chip in the Luban programmer.
2. Connect the programmer to a PC and open the programming software.
3. Click on “Check Factory Data” to read the EcID of the iPhone.
4. Read the EcID from the NAND chip.

Step 6: Write the New Wi-Fi SN Data

After obtaining the EcID, you’ll need to write the new Wi-Fi SN data into a new Wi-Fi module:

1. Copy the EcID and select “WiFi Operations” on the navigation menu.
2. Paste the EcID and click “Check now.”
3. Finally, click “Write now” to write the Wi-Fi SN into the new module.

Step 7: Replace the Wi-Fi Module

With the new Wi-Fi SN written, it’s time to replace the Wi-Fi module:

1. Place the signal board onto a fixture and cover other components with Kapton tape for protection.
2. Heat the Wi-Fi module with a hot air gun and use a pry knife to remove the edge adhesives.
3. Pry up the Wi-Fi module carefully.
4. Apply some flux to the soldering pad of the new Wi-Fi module.
5. Remove the tins from the soldering pad using braid and a soldering iron.

Step 8: Solder the New Wi-Fi Module

Now, we’ll solder the new Wi-Fi module onto the board:

1. Remove the tins from the soldering joints of both the signal board and the logic board.
2. Align the new Wi-Fi module carrying the SN to the soldering pad.
3. Solder the new Wi-Fi module with a hot air gun at 380°C and airflow set to 60.
4. Solder the NAND chip with the hot air gun at the same temperature and airflow settings.

Step 9: Test the iPhone

After successfully soldering the new Wi-Fi module, it’s time to test the functionality:

1. Put the logic board and signal board into a motherboard layered test fixture.
2. Connect the iPhone 13 screen cable and the power cable.
3. Use a pair of tweezers to trigger the power-on.
4. Check if the iPhone 13 powers on properly.

Step 10: Final Assembly and Testing

Once the iPhone is powered on, it’s time to finalize the assembly:

1. Go to Settings and check the Wi-Fi function toggle.
2. Solder the signal board with the logic board.
3. Assemble the iPhone 13 completely.
4. Test the Wi-Fi function to ensure it connects properly.

Congratulations! You’ve successfully completed the iPhone WiFi chip repair. With the new module installed, your iPhone 13 should now have functioning Wi-Fi once again. Thank you for following this guide!