[palomartian]

OK, so there is only one 9900, right? One set of frequencies? What, besides carrier specific boot screens, does one give up if taking a phone from one carrier to another? Assuming it was "unlocked" at some point.

[anon(52425)]

There are different frequencies for different carriers. If you use an att bold on tmobile, you won't get 3G and vice versa.

[anon(52425)]

And the same goes for the Verizon too. For instance I had a storm that I unlocked and used on tmobile. I only was able to get edge speeds.