I broke the screen of my iPhone 3GS and while waiting for the replacement parts to come in the mail I took my sim card and put it in a (very) old nokia phone. I used the Nokia phone until I was able to fix my 3GS screen. Now during that time, I bought a used iPhone 2g for 100 bucks and planned on putting my sim card in and using it until the 3GS was repaired. When I put my sim card in the iPhone 2G though it acted as though it was a brand new phone and said connect to iTunes and then when I did connect to iTunes it started making me pick text plans like I was setting up a new contract!? On a side note I was able to put my 3GS sim card into a friends 3GS phone and it worked right away just like it did when I put it in the 10 year old nokia phone and I was able to use it and make calls etc... So why am i able to put my 3GS sim card in other phones/iPhones and it will work right away, but I'm not able to do it with the 2G? Thanks everyone.