I have a 3 sim (contract) thought I would use it in my iPhone 3g. Is there any risk to this etc? Also I have looked into the YellowSn0w application which looks good but the thing is I still have 2.1 fw on the phone. I don't want to install YellowSn0w as it's still in beta version.
I have heard about the RebelSim is that any good and are there any restrictions to any services on this?