Does T-Mo only have 3G on the 1700 band? Or does it depend on region? I do notice that if I put my hand on the right side of the phone (I believe where cell antennae are) that signal strenght drops. Again, this is not something I exp. on my AT&T branded Q, so I'm not sure if its the "frequency" or "the 900's antenna/radio".

Does AT&T use "WCDMA"? Or is their 3G a different tech?