I was just downloading an email with an attachment. Suddenly the 4S reboots and comes back on to the Connect to iTunes screen. Connect to iTunes which then says "iTunes has detected an iPhone in Recovery Mode. You must restore...." I can't believe it. How can downloading an email trigger this sort of problem? I went from a fully working iPhone, to a completely corrupted phone, no iOS even recognised as being installed, within 3 seconds. Fortunately I take regular backups so I can restore ok but why the hell has this happened?????