It's work but don't have signal on my T-Mobile SIM card.
It's work fine with Telenor SIM card.
Phone is probably unlocked from some other network. (059G9N9: RM-774_eu_euro1_alps_light_silver)
I try other T-Mobile SIM card, and other T-Mobile SIM cards don't work.
I buy it on street dealer, but this is my 5th nokia phone from this dealer and this is first time to I have some problem.
In my country doesn't have official Nokia shop and service, so I try to go on some other phone service and they don't want to try to help me, becouse they don't know what is it. So I ask there.
So what you think to I change product code? Can it help?
I update before this phone few phones and there is never be some problem.