I'm wondering if anyone shares this same problem: I'll be using my iphone and the screen will randomly turn off. I can't get the screen to turn back on unless I lock the phone and then unlock it again. Then it returns me to to the main home screen. This has happened to me in Apple programs such as Contacts or Mail as well as installed programs such as Omnifocus. I don't know what is going on and it's driving me crazy! Any ideas?!