"would a Jihadi really use an iPhone"
I'm sorry, but with the best will in the world that is a really stupid comment. Sorry. Do you really think that a nutcase willing the destruction of the western world considers the device or operating system? Seriously?
And this was *always* going to be the outcome of this ludicrous case. Everything that this phone touched was already registered - every number in, every number out. Unless this madman got accomplices to pose for photos (duh...) what could the security services possibly have gleaned from it?