Why can't I open any applications on my iPhone?

Question

Until recently everything was working fine. But all the applications that I have put on my iPhone don't work. Everything that came preinstalled on the phone works fine. any help appriciated

Answer 1

Have you noticed this since the latest update? Doing abit of a google search i found similar problems, most people experiencing this have recently done the update.

Or as this started happening since installing a particular application?

The only thing I can think of would be to restore the iPhone and 'reinstall' the applications. If it is the second issue I mentioned be wary when getting the latest app again.