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.!
Resetting the HTC Inspire 4G
Performing a factory reset using phone buttons
If you can’t turn on your phone or access the phone settings, you can still perform a factory reset by using the buttons on the phone. With the phone turned off, press and hold the VOLUME DOWN button, and then briefly press the POWER button. Wait for the screen with the three Android images to appear, and then release the VOLUME DOWN button. Press VOLUME DOWN to select FACTORY RESET, and then press the POWER button. All data will be lost!
If you haven't update your phone yet pls do it. There is an HTC Inspire 4G for AT&T ROM Update released on 7.31.2012
This update will only be available for AT&T HTC Inspire 4G Customers and will be sent to the device over the air - OTA firmware update for HTC Inspire 4G.