Tip from InfoMobile

While HTC Kaiser TyTn II owners are enjoying the ability to surf any
GSM network in the world, AT&T customers with a brand-new AT&T Tilt
8925 are stuck with the AT&T-flavored GSM network. Nevermind that HTC
has been sued over the lack of a graphics hardware driver, a problem
which also afflicts the HTC Kaiser TyTn II.  HTC sells their mobile
phones unlocked out of the box, but AT&T locked the GSM radio in their
version of the HTC Kaiser - until now.

XDA-Developer forums user, jockyw2001, has posted instructions on how
to fully unlock (SIM unlock) your AT&T Tilt 8925 to work on any GSM
network in your country. And, if you need to travel abroad and your
AT&T Tilt doesn't like to play nice on foreign networks, jockyw2001
has posted instructions to make that happen as well (SuperCID).

Head on over to XDA-Developer forums to get your hands on the AT&T
Tilt unlock and SuperCID solutions.
http://forum.xda-developers.com/showthread.php?t=361039
http://forum.xda-developers.com/showthread.php?t=361236