I bought the R-SIM II unlocker without checking to see if my iPhone was iOS 5.0 or less. Is there any way I can still use that unlocker, even though my phone is iOS 5.1? Would I have to downgrade the iOS, unlock it, then re-upgrade it? And if so, could you provide the links that I need to do it? I really don't feel like buying the newer version of the R-SIM.