Root anyone running non att sim?

[bword]

I was looking into running a tmo sim or H20 sim. I went to a cell store and they said if i run t mobile sim I wont be able to get internet but if run the H20 sim I can get internet but it will be 10 bucks more a month.

 

[lunatic59]

The problem isn't the sim, it's the carriers network. AT&T operated is 3G band at 1900 MHz while T-Mobile uses 1700MHz. If the phone does not support that frequency, you will only get 2G/Edge speeds for data. I don't know much about H2O but i would guess that it uses 1900MHz too. Just note that to use any sim other than an AT&T sim in the Captivate, it must be unlocked.