Hi My 2 month old 3G 16GB iphone started up and unlocked as normal, plugged into imac, itunes opened OK. I disconnected it and went back to it 30 or so minutes later to find it would not respond to waking up or restarting, nothing? I have been having trouble with itunes for the past 24 hours after installing OS X 10.5.6. It will not allow me to transfer any new purchases to the iphone saying I need to authorize the computer, which I do and it tells me I have 3 computers of 5 authorized, but will still not let me play anything or transfer it to the iphone, just loops back into authorize. I tried it the other way around and downloaded a few songs / movies / apps on the iphone OK. The next time i synched it the new purchases were transfered from the iphone to itunes and it then reverted to the same authorizing loop.... Could this be connected to the iphone dying? Many thanks.