Will this work on GSM 3G networks abroad? I know that T-Mobile's 3G frequency is different from AT&T and that AT&T's 3G frequency matches most of the world's GSM 3G frequency but I was wondering if this device (Samsung Galaxy Tab bought from T-Mobile) has the proper hardware to work on both T-Mobile's and AT&T's 3G network. I am talking about 3G data access and not the slower EDGE (I am sure EDGE will work on both network). Thanks!
If it is Tmobile branded, you'll have to unlock it by either requesting for the unlock code from the carrier after a certain number of days or by doing the unlocking yourself. Being quadband, this should work on most parts of the world on EDGE (slower). Tmobile has a different band for its 3G frequency and the question is if this device is able to handle TMo's 3G band as well as AT&T's, which has similar 3G frequency as EU and such.