: Copy the files named WIFI and WIFI_CUSTOM to an external storage folder or your PC.

Network frequencies and signal tuning configurations.

Imagine you accidentally wiped your phone using "Format All" in SP Flash Tool. You reinstall the stock ROM, but now your phone shows "IMEI: Null/Null." The phone cannot connect to a mobile network. You have two options:

: Ensure you have root access to navigate system folders.

Once flashed, reboot your smartphone. Your cellular network should return to normal, and the Wi-Fi errors should disappear. Safety Guidelines and Troubleshooting