Before you buy a new cell phone or new tablet, please try the following procedure to repair your device. First charge your battery, backup your important data if possible and in most cases take out SIM and SD card. 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.
Vodafone VDA II hard reset
First, turn off the phone.
At the same time, press & hold the Left and Right Soft Key, (keep pressing 2 keys) + press the Power button once for 2 sec.