This product is unlocked as I understand it, must we use AT&amp;T in the USA for service?
1142482
Can be used with AT&T, Verizon and T-Mobile, but the 3G frequency used by the last (T-Mobile) isn't supported by this modem, ie you will only connect at 2G network.
2103481
The phone is unlocked, you can use for any carrier that require a sim card, for my area the phone can be used for AT&T; and T-Mobile.
310591
Without doing some research this phone will work in the US but definitely is not set up for ATT 3G (the carrier I used). It's unlocked and seems to be more set up for european bands. It may work on T-mobile 3G. I would guess that you can get EDGE service anywhere in the world on this phone though. I just made do with 2G coverage wheni was using it. Hopefully that's not too disorganized and answers your questions.
1949246
As I wrote in my review it's not new, not working properly and is not the one advertised. AT&T; has no international versions, only locked phones for US. My advise is to don't make the same mistake I did.
993781
The phone is unlocked it should work with AT&T; be aware though that you would get 3g at best
1210933
When I cam home to the US I purchased my sim from AT&T.; It works great. I was using it in Brazil and using a TIM sim.
669402
This is a AT&T only cell , meaning not unlocked, can be used in the USA with any AT&T compatible carriers like "Straight talk", "Red Pocket wireless", "AIO Wireless", without need to be unlocked. I'm not sure as far as usage compatibility in other countries, most likely not since it's an AT&T only phone. Thanks
2140815
Since it is an AT&T; phone, you don't need to have it unlocked to use on AT&T; prepay. Just put in a prepay simcard are you are good to go. And, no, the phone is not unlocked in that it can't be used on networks other than AT&T.;
1650171
I too would like to know this. If it's not unlocked then we are still stuck with AT&T;, so what is the point of paying full price for the phone?
244037
It says it's unlocked, but when I got it, it's for AT&T; only, so it might not work
1792395
This is not a unlocked GSM I took it to china thinking i could use it. It only works in the USA on att towers. I would try to get something in that same county if you are going to travel.
1596162
No it's not and if you buy you'll not be able to unlock because AT&T; will not let you unless you were the previous owner or have their information. Hope that helps
402152
I believe it is unlocked, which means you can get service from anyone. I went to ATT.
602803
It isn't a phone intended for the US market, mine works fine on AT&T; in the US. I have not tried to use mine out of the US. The unlocked 720 should work for you anywhere on a GSM network so long as the frequency is supported by the phone.
1086449
Unlocked means you can take this device to a contry outside USA and connected to any data plan available on that contry (other than AT&T;)
1730469
I don't use it in usa, but I guess so... my network in my country is compatible with at&t.;
338512
ATT in US??? That's what I need, but I am unsure of compatibllity with ATT (and company return policy if product fails in US).