The device is often placed in a "Diag" mode via USB debugging and specialized terminal commands ( setprop sys.usb.config diag,adb Repair Tools: Tools like ChimeraTool are used to write the original IMEI back to the device. Patch Certificate:

If you're unsure about the process or have concerns, consider seeking guidance from experienced Android developers or the Magisk community.

On the second device (the Xiaomi), the module actually managed to trigger the baseband, but the IMEI shown was a generic "00000..." string. The phone could see the SIM card but could not register on the network. This brings us to the biggest issue with these modules:

An IMEI repair involves restoring or modifying the unique 15-digit identifier assigned to your smartphone's modem, allowing it to connect to cellular networks.

Use SP Flash Tool or Maui META to connect via the Meta mode interface to write the hardware parameters directly. Step 5: Reboot and Verify