: Have the original IMEI (usually found on the box or by dialing ) ready to enter. Step-by-Step Repair Guide 1. Initial Setup and Rooting Unlock Bootloader : Go to Developer Options and toggle OEM Unlock
perform a "Patch Certificate" operation using the Z3X tool to fix "Emergency Calls Only" or "No Service" issues. Rooting Necessity: n971n u2 imei repair z3x