ZTE Optik hard reset

Reset ZTE V55 Power Key lets you reset the tablet to default by holding the Power Key for 15 seconds.

If you hold down all three keys it will put the android guy on the screen with a ZTE in the middle of it's chest then do volume down and power and it will go to the recovery screen.

Important: Before resetting your device, back up important data to your computer using a tethered USB connection.

or

1. From the Home screen, press the Menu Key and touch Settings.
2 Touch the Privacy
4 Touch Factory data reset.
5 Touch Reset tablet.
6 Touch Erase everything.

1. Touch HOME > Apps and select Settings > Privacy > Factory Data Reset. Read the Factory Data Reset information.
2. If applicable, select check marks for Erase internal storage area (media area) or Erase USB Storage.
3. Touch Reset tablet.
4. Touch Erase everything. Your device will power down and reset itself, which may take up to 10 minutes.


General advice: Before you buy a new cell phone or new tablet, please try the following procedure to repair your device in a software way. First charge your battery, backup your important data if possible and in most cases take out SIM and SD card before doing 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.! Please also note, that a hard reset operation will not unlock your mobile phone's SIM lock or network lock, but it will remove the unlock pattern, remove the user password or PIN password (NOT the SIM card's 4 digit PIN code). Also note that the firmware version will not be affected in any way, it will not be downgraded, it will remain the same you are using and if you have rooted your device, root privileges remain also unaffected.