My daughter is visiting me from Venezuela. She has a BB Curve 9300 that is already unlocked. When I try to put a Sim card from T-Mobile, it shows SOS but no network. I checked the frequency and both T-Mobile and Movistar (Venezuela) are 1900. How can I have her phone work here with T-Mobile?
If it was not unlocked, it would say Invalid SIM or enter Unlock code. As for the issue at hand, does the SIM work in your (the ops) cell phone? Do any other SIM cards work in the unlocked device.