theres no other way to do it. if its not working your process isnt right. here is the sprint pdf user guide for the tp2. page 124, "how to perform a hard reset.
http://support.sprint.com/global/pdf...ch_pro2_ug.pdf
To perform a hard reset:
1. With the device turned off, press and hold the Talk and End keys first, and then press and hold the Power
button until you see the following message on the screen:
2. Release the Talk key, End key, and Power button.
3. Press the Volume Up button to restore the device to factory default status.
– or –
Press any other front panel key to cancel the hard reset and just power on the device