I have an Iphone 3 with AT&amp;T service. If I ordered this phone, would activating it and using it be as simple as replacing the SIM card
1629783
I'm not entirely sure but I'm guessing once you buy a phone that's "unlocked" it should work, I activated my Sim card with the iPhone I ordered but headphone jack didn't work so returned it and bought galaxy instead(unlocked at&t)and still works with my providers Sim card(cricket basically any unlocked phone works)again not entirely sure but if it's unlocked your Sim card should be all you need to activate new phone, to be sure ask a local AT&T store hope this helped.
941398
There was no problem at all activating my daughters iPhone. We already had the phone card so when the phone came in the mail we activated it in about 10 minutes. It was a lot easier then I thought I am not that tech savy.
1781945
I was a cingular customer on a month to month contract. I renewed a 2 yr. contract with AT&T through amazon and bought this phone. The phone will come with a new 3G sim card, which you need to use in order to take advantage of AT&T's 3G network. Once you get the phone and new sim card, just call AT&T and they will activate your new sim card and at the same time deactivate your old sim card. You can keep your old number (which I did), or you can pay $36 to activate a new number. Also, there is an $18 charge to upgrade your equipment/phone (standard fee).
1580113
if you already have att all you have to do is put your sim card in the phone and you are set if not then yes if you want att as your service provider then take the phone there
2137062
It should work as I used mine in unlocked iPhone 4S, however I had to call AT&T to manually activate the sim
35947
Actually you need to call att so they activate the Sim card. Once the card it's activated than you explain them that you want to keep your old number. They can tell you how to add call and text time to it.
591227
After you activate the sim card online or by calling an att rep.. They will assign your sim a number.. Works perfectly!!
1496566
So, if I have an AT&T; account already, can I just switch SIM cards and have it work?
1124885
I suggest calling your carrier directly. The will be able to activate it or give the correct number to activate it.
639970
I use three different sim cards in my phone depending what country I am in at the time. If you are already with AT&T; they can fix you up with a new card with your old number. No problem.
1083239
I had the att LG phone and I easily switched the SIM card back and forth between the two with no reformatting. I believe it would work the same, but I don't have an iPhone so I'm not sure.
2167471
yes you just need to add your att sim card into it and it works. make sure its a to go phone and new.
1878118
yes. We just took it to the ATT Store and they activated it for service on our existing account.
1926507
Yes you can just take the phone to a local store and they will activate it with your same number
1452260
you should be able to just put in the new phone and should work fine. I'm with at@t and had no problems
2137065
It should work as I used mine in unlocked iPhone 4S, however I had to call AT&T; to manually activate the sim
412222
If AT&T; is your provider, just insert you SIM card and all AT&T; network functions will immediately work as they should. You won't even have to visit the local AT&T; store for activation. The phones that are advertised as "compatible" or "unlocked" will not. They must specifically state that the phone is programmed for the AT&T; network as this one does. I bought two phones from this seller in the past year and both are still working fine and have been totally problem free. Even my elderly mother hasn't been able to mess her's up as she did with it's three predecessors (ha! ha!). If AT&T; is your provider, just insert you SIM card and all AT&T; network functions will immediately work as they should. You won't even have to visit the local AT&T; store for activation. The phones that are advertised as "compatible" or "unlocked" will not. They must specifically state that the phone is programmed for the AT&T; network as this one does. I bought two phones from this seller in the past year and both are still working fine and have been totally problem free. Even my elderly mother hasn't been able to mess her's up as she did with it's three predecessors (ha!... » Read More If AT&T; is your provider, just insert you SIM card and all AT&T; network functions will immediately work as they should. You won't even have to visit the local AT&T; store for activation. The phones that are advertised as "compatible" or "unlocked" will not. They must specifically state that the phone is programmed for the AT&T; network as this one does. I bought two phones from this seller in the past year and both are still working fine and have been totally problem free. Even my elderly mother hasn't been able to mess her's up as she did with it's three predecessors (ha! ha!). « Show Less