Hi, I purchased an iphone the other day from ebay and I got an orange i-smartphone sim adapter with it, which they claimed would unlock it. However, I tried to do what they said, just plugging it in but it doesnt work. It says no sim. Eventually it says 'searching' but it never gets to a point where it recognizes my carrier - tmobile. I was frustrated so I tried 'reinstalling' firmware 2.1 (it was 2.1 when it came), but nothing is happening. (was this a bad thing to do?). I did not jailbreak the phone or anything - would this be necessary to do this? In addition, i have seen videos online where people go to 'APN' settings, which is an option that I cannot see in the network settings. Can someone help me please? I honestly am not sure what I should be doing because there aren't any clear instructions on the i-smartphone website. Thank you very much for any help!