If the official repair fails, professional servicing tools are often required to rewrite or patch the IMEI area (EFS/NVRAM).
Follow the on-screen prompts to download and reinstall the official firmware. repair imei sony xz3
Most of these methods will erase all user data . Perform a full backup before starting. If the official repair fails, professional servicing tools
Ensure your device has at least 60% charge to prevent it from shutting down mid-process. 1. Identifying Your Device and IMEI If the official repair fails
The device software (if still accessible) by dialing *#06# or going to . 2. Software Repair via Xperia Companion