Before attempting software repairs, dial to see if the IMEI is "Null" or "0". If the Baseband version in Settings > About Phone is "Unknown," the issue is likely a hardware fault with the Qualcomm Snapdragon 662 modem, which software cannot fix. 2. Software Methods for Restoration

Connect the phone in Fastboot Mode (Hold Power + Volume Down). Select "Rescue" in the LMSA software and follow the prompts to download and flash the official firmware. Risks and Technical Warnings

Known for effective "1-click" repairs on Motorola and Lenovo devices, it can patch the IMEI without data loss if the bootloader is unlocked. 3. Step-by-Step Restoration (LMSA Method)

If the baseband is intact but the IMEI is missing due to a bad firmware flash, use these professional-grade tools: