i've had this problem for a while and posted a new thread but still found no solution.
I recently unlocked my iPhone with ultrasn0w a few weeks. the first day i didnt notice but some calls dont go through. If they leave a message on my voicmail it will appear and tell me. I will receive text messages like 2 or 3 hours after they were originally sent and sometimes will get three or four messages at a time. Some calls and texts go through perfectly it happends a few times a day. Its rather irritating everything else works perfect. I am pretty clear this is the iPhone and not T-Mobile... i reinstalled ultrasn0w and still have this problem is this common? is there a fix or any sort of way to troubleshoot it? 3G is off data roaming is on etc.
please let me know if there is some sort of a cydia application to fix this or am i just screwed and have and expensive phone that is messed up..?