Root HTC Desire Z/T-Mobile G2/HTC Vision (
Warning: The T-Mobile already released an update to to 2.2.1, it will destroy the ROOT! Do not do the upgrade!
See the tutorial, read the tutorial and watch every step, any problem with your phone is your problem!
Android SDK:
http://developer.android.com/sdk/inde...
G2 Root (Pack:)
http://www.mediafire.com/?jmdqt1z03ms...
Reference, more informatation and SIM unlock:
http://forum.xda-developers.com/wiki/...