So here are the facts : I'm on Tmobile using a blackberry. I bought a 3g iphone from someone and am trying to get it to work w/tmobile. I read alot about "no chip cutting - just insert and you're connected with TurboSim" so I got that. I inserted it and I get either a "No Service" or "----" for the signal. I have a couple of questions - what is the difference between jailbroken and unlocked? Nevermind - read Chris' thread on jailbroken & unlocked. Do I need to jailbreak before the Turbosim can pick up the signal? Question still pending When trying to connect to itunes with the turbosim+Tmobile Sim, I get a invalid SIM message on Itunes. Read the thread about putting it in Airplane mode to get it to sync. Can someone please help with specific step by step directions on how to get this working? Thank you.