In our description database there are 2 solutions for performing hard reset for HTC HD mini.
Choose the first method and follow the steps to perform a hard reset. If the first solution does not work, try the next method.
Please remember! Hard reset will delete any and all data your device contains; like pictures, contacts, messages, apps etc. Everything. HTC HD mini device will be brought back to the same configuration as that of a brand new device.
1. Power down the phone.
2. Press'n'hold Volume Down + Volume Up + Power buttons.
3. Wait for the warning message to appear on screen and press Volume Up to confirm the operation.
4. Press Volume Up again when the Restore Completed message shows up.
5. Your phone will now restart. Voila.