ZTE Nubia Z9 mini hard reset: From the Home screen, press the Menu Key and touch Settings, then....

ZTE Nubia Z9 Max hard reset: From the Home screen, press the Menu Key and touch Settings, then....

ZTE Blade S6 Plus hard reset: From the Home screen, press the Menu Key and touch Settings, then....

ZTE Nubia Z9 hard reset: From the Home screen, press the Menu Key and touch Settings, then....

ZTE Blade Qlux 4G hard reset: From the Home screen, press the Menu Key and touch Settings, then....

ZTE Maven hard reset: From the Home screen, press the Menu Key and touch Settings, then....

ZTE Sonata 2 hard reset: From the Home screen, press the Menu Key and touch Settings, then....

ZTE Obsidian hard reset: From the Home screen, press the Menu Key and touch Settings, then....

ZTE Axon Pro hard reset: From the Home screen, press the Menu Key and touch Settings, then....

ZTE Blade D6 hard reset: From the Home screen, press the Menu Key and touch Settings, then....

ZTE Boost MAX+ hard reset: From the Home screen, press the Menu Key and touch Settings, then....

ZTE Axon Lux hard reset: From the Home screen, press the Menu Key and touch Settings, then....

ZTE Nubia My Prague hard reset: From the Home screen, press the Menu Key and touch Settings, then....

ZTE Grand S Pro hard reset: From the Home screen, Touch HOME > APPS > Settings...

ZTE Grand S3 hard reset: From the Home screen, press the Menu Key and touch Settings, then....

ZTE Zinger hard reset: From the Home screen, press the Menu Key and touch Settings, then....

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.