I have a iPhone 4, version 3.1.3, 16GB and i have T-Mobile.. This morning the signal went to "Searching..." and it didn't come back. So, I re did the procedure with the GEVEY Pro again. All the steps work but at the very end it failed.. So I looked up another way saying that you have to wait a bit while you're in airplane mode, so that's what I did. At the end, I got 3 bars, but the T-Mobile didn't show. I waited for a while, but it still didn't show and also possibly went back to "no service" or "searching.." if I remember correctly .
If anyone has another solution or can tell me what I'm doing wrong, it would help out a whole bunch. Thank you