Is it compatible to AT&T or T-Mobile?
834920
It works with T-mobile definitely. Please check AT&T;'s frequency to make sure it will work.
834921
Unable to answer the phone was bought as a gift and they don't use any of those networks
635634
Yes it is. I am currently using T-MOBILE too. (it work very well with T-Mobile)
697914
It should as long as the ESN is clear and unlocked its compatible with T-Mobile at&t and Verizon phones
2042922
If it is compatible with at & t, but your operating system leaves much to be desired, does not work well
1656634
This is an Unlocked GSM device, it is compatible with T-Mobile since they are a GSM carrier provider.
1579165
No it's not fully compatible with AT&T.; that's why I had to return it. I only could use it for the basic like calls and text and not internet. That's been over an year ago tho so who knows. Not sure about Tmobile.
1845503
I Think Yes, I don't have At&t; but I Have T-mobile and it work just find and din't have no problem..
926699
yes it is. just insert your SIM card and it will work. my network is t-mobile and had no problem with that.
513928
This unlocked Cell Phone is compatible with GSM carriers like AT&T; and T-Mobile. Not all carrier features may be supported. It will not work with CDMA carriers like Verizon Wireless, Alltel and Sprint.
2122193
No this phone is only compatible with AT&T carrier service. Now if you want to you can watch videos on how to unlock the phone which will allow you to use it on any carrier.
1410364
Yes it does.It's a unlocked Smartphone,that can accept T mobile or AT&T; SIM card.
2183604
Yes, the Xperia M is compatible with an AT&T; SIM card.Thank you.Customer support @ phonesnbeyond
189152
Yes. It is a GSM phone so it will readily work with AT&T; and T-Mobile. However, it won't work with Verizon or Sprint.
1691211
Yes, the Xperia SP LTE is compatible with AT&T; throughout the US.Thank you.Customer support @ phonenbeyond
313849
From what I understand, it is fully compatible with AT&T;, T-Mobile, Sprint and unlocked Samsung Galaxy S3's. I have T-Mobile and it works great.
1854491
Yes it is, look anything that comes from AT&T; its compatible with Movistar bands.
2122192
No this phone is only compatible with AT&T; carrier service. Now if you want to you can watch videos on how to unlock the phone which will allow you to use it on any carrier.