Soft Reset ZTE Nubia Z9 Mini Elite

First method:

  1. Firstly press the Power button. Hard Reset ZTE Nubia Z9 Mini Elite
  2. From the menu which should appear on the screen choose Power Off and then tap OK.
  3. Wait a few seconds.
  4. Hold down the Power key again to turn the phone back on.Hard Reset ZTE Nubia Z9 Mini Elite

Second method:

  1. Remove the back cover and the battery for a short while. 
  2. Put the battery and the cover back in. 
  3. Turn on the phone by holding the Power buttonHard Reset ZTE Nubia Z9 Mini Elite
Help! This doesn't work