Probably has nothing to do w/ unlocking, the phone might not support 900 mhz GSM. If it came from the US, it might only support 850 or 1900 mhz. What is the manufacturer of that model?
i live in nairobi kenya. africa...my question is can my smt5600 wrk here-the frequncy here is gsm900 only.is there anything i can do to fix this...the phone shws network."denied searching..."
is the problem frequencies r is the phone just not unlocked from at&t.i bought it from e-bay unlocked (r so they said)
im desparate t have it wrking.i love this phone

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic