Wirelessly posted (htc Pocket PC: Mozilla/4.0 (compatible; MSIE 6.0; Windows CE; IEMobile 8.12; MSIEMobile6.0) Sprint T7380)
I suggest you flash the shipped rom for Sprint for your device. Then if you still have issues I suggest you ask someone from Sprint for your MSL or use this app to retrieve it:
http://forum.ppcgeeks.com/htc-touch-...mogul-etc.html
Then dial ##786# then click on Menu at the bottom right.
Press Reset then OK and then enter your MSL. The phone will do a factory reset. Then you need to program your mobile number & MSID back in (##msl#) Then run Update Profile in Settings. That should do it.