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 before factory reset. 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. With or without insurance, if your cell phone lost, damaged or stolen at least your invaluable data is backed up in a safe place. If you are about to sell your phone and you want to wipe your personal data, or if your phone affected with virus you have to do a hard reset. In some cases, you can delete the forgotten password or lock pattern from your device as well. All information is for devices with stock based ROMs. If you are using rooted device, always back up your EFS folder first, containing your IMEI info, etc.!
T-Mobile myTouch hard reset
If you can’t recall your unlock Pattern:When the phone is turned off, press and hold the Power/Lock + Volume Down.
After 3 seconds press Back and Menu keys.
WARNING: If you perform a Hard Reset, all user applications, user data and DRM licenses will be deleted. Please remember to back up any important data before performing a Hard Reset.
T-Mobile myTouch firmware upgradeDownload mode
Turn off your T-mobile myTouch. Press the Volume Down + Volume Up and Power keys together.
On the screen the 'S/W Upgrade, Please wait while upgrading...' message should appeare..