Remember, your IMEI is legally tied to your specific phone. Always restore the original number printed on your phone’s box. If you feel overwhelmed at any step, paying a professional $20 is far cheaper than buying a new phone.
Warning: altering or repairing IMEI numbers can be illegal in many jurisdictions and may void warranties. Only proceed if you are the device owner and repairing a corrupted IMEI (for example after flashing firmware or hardware replacement). Check local laws before attempting any repair.
Navigate to > Additional Settings > Developer Options and toggle on USB Debugging . Professional Tools for Repair
Do not attempt to change your IMEI to evade tracking or bypass blacklisting. That is a criminal offense in most jurisdictions.