Thread: Sony Ericsson K550i?

Ive been wanitng to get a phone for some time now, and i found this one. i was wondering if this phone is compatible with AT&T's network? These are the networks available for this phone : GSM 850 / GSM 900 / GSM 1800 / GSM 1900. I dont know if mine's there. Please help me. Thanks!!

Ya sure sony ericsson K550i is compatible with AT&T sim only if it is unlocked one .Else if the phone is locked to some other network provider then you can't use AT&T sim in it until you unlock it .You can easily unlock your phone using sites like OnlineGSMUnlock.com they are rendering unlock code for all mobile models at reliable cost .