Hard Reset HTC Inspire 4G

First method:

1. Use the Power button to switch off the device.
2. Press and hold Volum Down and Power buttons together.
3. Wait for the three Andoid images.
4. When you see them, choose the Factory Reset by pressing the Volum Down to navigate andPower button to confirm. 
5. Success!

Second method:

1. Turn on the phone by using the Power button. 
2. Go to Settings and then to Storage.
3. Tap Factory data reset. 
4. Choose Reset phone and select Erase everything.
5. That's all!

WARNING !
Hard Reset will erase all of your data
All described operations you are doing at your own risk.