Wirelessly posted (htc Pocket PC: Mozilla/4.0 (compatible; MSIE 6.0; Windows CE; IEMobile 8.12; MSIEMobile6.0) Sprint T7380)
First get your MSL from Sprint or use one of the MSL Grabber apps to get it. Then dial ##786# and then click on Menu at the bottom right.
Press Reset then OK and then enter your MSL. The phone will do a hard reset and reprovision all should be right with the world.