Like title said, im having problems with my new iphone. I bought my phone brand new that someone unlocked and jailbroke. Everything works fine when it needs to be but sometimes the phone doesnt. For instance, there would be at times (probably once a week) where i have no data, i cant check weather, cant check mail, cant go on the internet but my phone capabilities work. I would have to turn off, then turn on the phone to get that to work. HOWEVER, that itself lies another problem. EVERYTIME i reboot the phone, the phone doesnt recognize my sim card. It doesnt say, "no sim card" or "invalid sim". It just shows the bars icon but it doesnt say my service provider which is T-mobile. Almost like you're using the wrong sim or a sim thats not activated yet. In order for the PHONE to work again, i would have to pop my sim tray, wait about 10 seconds, then pop it back in again. Then it would restore itself in about 20-30 seconds. I have to leave my phone on all the time so i dont have to do the sim tray deal. But i have to anyway when my data gets stuck and doesnt work. At first i thought it was my sim card because i had it for about 5 years, plus i was looking at the gold plate contacts and it was scratched up. So i bought a new sim card a couple of days ago and had it activated last night. It worked fine right away. Then this morning data was shot again so i had to reboot even though i didnt want to. I was hoping everything was normal since i have a new sim card but nope, same thing, i had to pop the sim tray for 20 seconds, then reinstall and then it works now. My service provider is T-mobile. My phone is unlocked and jailbroken 2.2 with 2.28 firmware. The guy i bought the phone from said no turbo sim is needed so right now i use just my tmobile sim card. Could it be that the phone is defective?? Or are you tmobile guys having the same problem? Someone please help, if its a service provider thing, im gonna switch to another phone carrier. Thanks for reading.