Iphone 3GS won't activate iphone
I have tried to update the ios on my iphone 3GS and I get the error "your iphone could not be activated because the activation server is temporarily unavailable". I have tried to restore my phone and this does not resolve the issue. I have also tried reinstalling itunes as per the trouble shooting guides and this does not work. It does not work when I have a sim card in there or when I don't.
Please help!
iPhone 3GS, iOS 4.1