Need help

Contributor

Need help

Hi, I got a phone that

Frequency:Tri band GSM 900/1800/1900 Mhz

Any one know if ATT SIM will works on this phone or not

 

Thanks!! 

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Re: Need help

There are two issues here. First, the phone must be SIM-unlocked if it originally came from another carrier than AT&T. Second, it'll work on the 1900MHz frequency that AT&T uses, but you may experience large coverage gaps because AT&T uses both the 850 AND 1900MHz bands. Phones without the 850 band (and no, 900 isn't the same thing) won't work as well as a phone that natively supports both of AT&T's bands.

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Thank you very much!!

 
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