Commtiva Z71 android 2.1 soft reset

If device frozen or not responding, take out the battery.
reset Commtiva Z71 reinsert battery
Reinsert battery then power on device for about 5 secs.
reset Commtiva Z71

Commtiva Z71 hard reset

To enter FTM mode
reset Commtiva Z71

With the phone turned off, press both VOLUME DOWN + UP buttons, then keep pressing VOLUME keys + press  POWER ON key for a few seconds.

Commtiva Z71 hard resetCommtiva Z71 hard reset