generally uses a or MediaTek (MTK) chipset. MediaTek : Uses the SP Flash Tool . Spreadtrum/Unisoc : Typically uses the SPD Upgrade Tool . Download Requirements :
Unzip the firmware and the SPD Upgrade Tool on your PC. Firmware ZTE Blade A51
To check chipset: install or Device Info HW from Play Store. generally uses a or MediaTek (MTK) chipset
: Install the latest ZTE Handset USB Drivers on your PC. Firmware ZTE Blade A51
The tool will show a progress bar. Release the volume button. Finish: A green "Passed" message will appear when done. Critical Troubleshooting Tips