
Originally Posted by
TheCellphoneGuy
As long as the T-Mobile phone is unlocked and supports the necessary frequencies - 1900MHz or 850MHz, then it should work fine.
What I meant with the SIM card is the following. I recently activated a GoPhone account on my Samsung Galaxy S2 and when I put the GoPhone SIM card in another phone, it wasn't detected. At first I thought that there was something wrong with my phone, but upon further research, I've found out that the GoPhone SIM card is locked to my Samsung Galaxy S2 (the phone that I used to activate the service) and it won't work with any other phone for 180 days.
So when you activate the service, make sure that you do it with a phone that you'll definitely be using. Otherwise you will have to call AT&T customer service and from what I read some had success with it while others had to go to the AT&T store and get a need SIM.
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