Before you buy a new cell phone or new tablet, please try the following procedure to repair your device. First charge your battery, backup your important data if possible and in most cases take out SIM and SD card before factory reset. It is impossible to recover your data after doing a hard reset, so online backup is always important. For all of your data, a backup should be done on an external device, hard drive, raid system or media. With or without insurance, if your cell phone lost, damaged or stolen at least your invaluable data is backed up in a safe place. If you are about to sell your phone and you want to wipe your personal data, or if your phone affected with virus you have to do a hard reset. In some cases, you can delete the forgotten password or lock pattern from your device as well. All information is for devices with stock based ROMs. If you are using rooted device, always back up your EFS folder first, containing your IMEI info, etc.!
ZTE Blade3 III hard reset ZTE Blade 3 unlock password1. Turn the phone off.
2. Hold Volume UP key and Power key to enter into recovery mode.
3. Select Factory reset / wipe data with volume down.
4. Confirm: Home key.
5. Reboot system now. Everything will be lost!
ZTE Blade3 III firmware upgrade1. Hold Volume down key and Power key to enter into recovery mode.
(Download update.zip from ZTE website and copy to your sd card root folder)
2. Press Home key to enter into option list. Press Volume down key to choose apply sdcard: update.zip
3. Select update.zip and press Menu key to start upgrade.
4. The upgrade is completed after 1-2 minutes, then the mobile phone automatically reboots.
You can reset your ZTE device's password: Turn off your phone, then turn it on. Select emergency dial. Input *983*987# in emergency dial-up pad. It will restore factory settings and your personal data will be erased.
If your Blade 3 Android 4.0 phone is responding to screen input, then open Settings from the Applications menu. Tap Backup & reset > Factory data reset, click Reset phone and then Erase everything to format your phone.
All data will be lost!