Hello, I have a successfully unlocked iPhone 4 for T-Mobile. One frustrating problem that I've experienced is that the carrier/service will go missing upon a reboot. The upper left corner will display 'No Service' or one bar. This is not a big problem since I only turn on/off my phone every now and then, but still a bit annoying. The only fix is to continuously restart until the 'T-Mobile' logo is present and service is regained. Does anyone have a permanent fix?