Ursprünglicher Beitrag von: Eric ,
Have you tried doing a hard reset to restore the phone back to factory settings? The procedure does and will delete all files and downloads that are on your phone. How to do a factory reset: 1) Turn the phone off. If you can't, remove and reinstall the battery 2) With the phone still turned off, hold down the Power button+Volume up+Menu buttons at the same time for about 10 seconds. 3) Scroll down and select 'Wipe Data/Factory Reset'. 4) Select 'Yes – Delete All User Data'. 5) Select 'Reboot System Now'.