will my sim card from at&amp;t work out of the box
1011144
It should. My Consumer cellular sim card did in both the 3gs and my current iphone 4.
412223
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!).
635226
I got this phone through Cricket, who uses AT&T's network. Therefore, it will work.
503134
Yes. You simply take the SIM card from your old AT&T; phone and put it in this one. I picked this phone because it can be used overseas as well. It's working fine for both of my parents.
2051433
the 3G network of AT&T; is WCDMA, and this phone support WCDMA, so it will still work with your SIM card
1009431
I had the phone through Verizon and had no problem getting it activated. I am not sure about at&T.;
625623
Yes. It works with a Sim card. Actually says AT&T; when booting up. I use with consumer cellular.
1313850
I ahve not tried using AT&T with this phone; but I strongly believe it will work.
524291
Yes it will work because it is an At&t; phone. Just switch out the Sim card and place into new phone. Make sure it is a micro sim.
1672926
I got this phone through Cricket, who uses AT&T;'s network. Therefore, it will work.
945144
If your SIM comes from an iPhone 4 or 4S (or an earlier model) it will not work. However, it took me ten minutes at an AT&T store to get a compatible SIM for my 5S and to get it assigned to my phone number.
144106
Yes, a Go Phone SIM card works right off the bat. A normal SIM card - you might need to go to the AT&T; store to give them the phone's serial number.
1589017
Yes it will work because it is an At&t phone. Just switch out the Sim card and place into new phone. Make sure it is a micro sim.
424773
It Will Need To Be Unlocked. Even If It Is, Just In Case Go To The At&T; Place To Make Sure, That Is What I Did.
1557194
You would have to check with your service provider or with Samsung. AT&T; provided a new sim when I signed up with them for data service.
582078
Worked fine for me on AT&T.; I just put the SIM card in from the old phone and I up and running in minutes.
1612161
I don't think so seeing that it is a T-Mobile sim card. You should try and speak to an AT&T; customer service rep and ask them but I doubt it.