if the intent is to mask a stolen device. This guide is intended for technicians repairing phones where the original IMEI has been corrupted due to a bad flash or software error. Always ensure you are writing the original IMEI number that came with the device hardware.
However, I must give you a critical warning first:
If the phone's operating system rejects every master code, the firmware structure requires a software-based injection via a PC connection. Fix IMEI on SPD , RDA & Coolsand Mobiles – All FREE!
or a specific center button) while plugging in the USB cable to enter Download Mode
This is widely considered the . The Infinity Box CM2 dongle is a hardware-based tool that supports MTK, SPD, and RDA/Coolsand chipsets.
If successful, a menu titled or "Engineer Mode" will appear. Select the SIM slot (SIM1 or SIM2) you need to repair.
Carefully type one of the codes above (e.g., *#0066# or *#8378# ).
If you’ve been in the Samsung repair game long enough, you know the nightmare: A perfectly good Samsung Galaxy (S20, Note 20, A series) suddenly shows "Null IMEI" or "Not Registered on Network" after a failed firmware flash or root attempt.
While you might find codes online like *#364663# or *#87# to enter Engineering Mode, these menus rarely allow you to an IMEI number. They usually allow you to view hardware versions or perform audio tests, but not modify the NV data (where the IMEI is stored).
