For modern SPD/UNISOC Android devices, dialer codes alone often cannot rewrite the IMEI due to security locks. Technicians typically use the WriteIMEI Tool

How to fix an invalid IMEI issue on your smartphone - Airtel

Carefully input the 15-digit IMEI number found on your device's original box or under the battery.

: Select "Write IMEI" or "Apply" and reboot the phone to save changes. Recommended Software Tools for 2026

SPD is among the hardest to repair without a box/dongle.

: Primarily used for flashing firmware, but often bundled with NVRAM repair capabilities. Legal and Ethical Considerations It is critical to distinguish between

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