If your "Baseband version" is "Unknown" in settings, the modem firmware is not communicating with the OS. You must re-flash the stock CP (Modem) file via Odin before attempting an IMEI repair.
The International Mobile Equipment Identity (IMEI) is a 15-digit unique identifier assigned to every cellular device. Think of it as a social security number for your phone. Networks use it to: change imei exynos processor
Using a service tool, the current EFS data is read. If the IMEI is showing as "Unknown" or "000000...", the tool may need to "Reset EFS" to create a clean slate for writing the original identity back to the hardware. 3. Write the IMEI If your "Baseband version" is "Unknown" in settings,
Q: Is changing IMEI on Exynos devices safe? A: Changing IMEI can potentially void the device's warranty and may cause issues with device functionality. Users should proceed with caution and at their own risk. Think of it as a social security number for your phone