Hard Reset steps:
Step 1:First turn off your ZTEsmartphone.
Step 2: Release any SIM card and SD card on your smartphone.
Step 3:Press and Hold Vol+ key and Power key 10 seconds.

Step 4: After some time you got system recovery mode Use Vol ? key select wipe data/factory reset and press Power key to confirm.
Step 1:First turn off your ZTEsmartphone.
Step 2: Release any SIM card and SD card on your smartphone.
Step 3:Press and Hold Vol+ key and Power key 10 seconds.

Step 4: After some time you got system recovery mode Use Vol ? key select wipe data/factory reset and press Power key to confirm.