What are the GSM frequency
are 850/1900, is that correct? And T-Mobile is 900/1700? What are the others: 1800 and 2100?
I want to be sure that I wasn’t bidding on an unlocked phone from another country where I wouldn’t be able to use 3G here in the States.
 
Answer:
 
Generally speaking, this is basically how it is……I’m nearly 100% sure. you can do a few minutes of google searching to verify it yourself.
AT&T: 2G/3G/4G – 850/1900
T-Mobile: 2G – 1900, 3G/4G – 1700
Europe/Asia/Africa – 2G 900/1800, 3G – 2100

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