That's if they can use their iPhone
Looks like Apple have pulled a Microsoft today and released V2.0 software for the iPhone which seems to have bricked thousands of phones due to the update having to re-activate their handsets and the activation system within Apple being down.
Just take a look at the Apple Discussions forum. Interesting reading :)
Glad I've not done my PiePhone update yet. Seems like Job's jesus phone has just been crucified what with O2 not being able to enable handsets. Scuppered by their own DRM!!