Before you buy a new cell phone or new tablet, please try the following procedure to repair your device. First charge your battery, back up your important data if possible and in most cases take out SIM and SD card.
Huawei ideos s7 hard reset
With the tablet turned off, press and hold MENU + CALL + power.
Factory default from Menu
1. Settings.
2. SD & phone storage > Factory data reset.
3. Reset > Erase everything.