I just bought two iphones 3g from Ebay. One is 16gb and the other is 3gb. 16gb has all the applicaton on the screen and when I turn it on it says "NO SIM" ( I dont know if that means it is activated or not) . So I just bought turbo sim and I placed the trubo sim in between the slot and my sim card (from T-mobile). I let it stays like for like 5 to 10 mins. It says " NO service "the bar comes and then they disappears. I try to hook it up with Itunes and it says the sim card you are using is not valid. Plz help me out here. When I connect the iphone without the sim card it does let me sync with my music so I dont know what is going on here. I can go to general app and see that it has 2.1 version. Also with 8gb, that phone is not even activated,when I turn it on it says connect with Itunes, I tried to put the sim card with turbo sim in that as well but no luck. I connect the phone ( with simcard and turbo sim) with itunes and it says the same thing that the sim is not valid. Also , Do you think I should just leave the sim card with the adapter in their for like an hour or so ? or do I need to jailbreak it before I can use the sim card? I need help.... I would really appreciate it.