Hard Reset on HTC U-1u

How to Hard Reset on HTC U-1u U Ultra TD-LTE?

Make sure you turned off your phone.
Hold down the Power button and the Volume Down key for ten seconds.
Now you'll see the Download mode.
Then select "Boot to Recovery Mode".
When the " ! " appears, hold down the Power key and press the Volume Up key.
Use the Volume key and the Power button to select "Wipe data/factory reset".
Then go for "Yes - delete all user data" to finish the process.
Confirm by pressing "reboot system now".
That's all! After these actions, your phone data will be deleted.