The —whether *#*#83781#*#* or the AT command AT+EGMR —is a powerful lifeline for budget phone users. It transforms a bricked (cellular-wise) phone back into a working device in under two minutes.
Your specific Android build (e.g., Android 12 Go) has moved the Engineer Mode to a hidden activity. Download an app like "Activity Launcher" from the Play Store, search for "EngineerMode" and launch it manually. spd android imei repair code
Carefully input the 15-digit IMEI number found on your device's original box or under the battery. The —whether *#*#83781#*#* or the AT command AT+EGMR