The Rebel Simcard II has been tested and confirmed to work on the Latest range of HTC Smart phones Worldwide.
Some of the Latest HTC Phones that have been tested are among the following
HTC HD2 Tattoo Hero Smart Viva Touch Magic Max 4G Google G1 G2
Unlocking Has Never been Easier for HTC Smartphones with Windows mobile and Android.
Safest way and You do not Modify the Phones software in any way and do not need to use software or cables.