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Unlocked iPhone 4 on T-Mobile, Occasional No Service

A

Ann P

macrumors 68020
Original poster
Jun 29, 2009
2,311
9
California
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?
 
What usually works for me when that happens is I remove the sim and put it back in then reboot it. But I haven't found what you are looking for exactly.
 
Ann P said:
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?
Click to expand...

I have the same problem, what I do is reinstall ultrasn0w and respring and it usually works. Its frustrating but what are you going to do?
 
I am having a similar problem with an unlocked iphone 4 (latest ultrasn0w) with T-Mobile (UK) whilst I’m home for the holidays, what I found worked the best is putting the official Softbank SIM card in, switching it off and on again, then changing the SIM cards and resetting it again and it comes up, it’s a pain in the arse but seems to work (twice at least)
 
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