I've was at home and the "ask to join wifi network" screen popped up and I selected my home wifi. It connected and didn't drop the signal if I put the phone In sleep mode (it would stay dropped even when I woke it up). Then I got back home this evening after dinner and it has automatically connected. Something it never did before. This is my second iPhone 5 and both have has the same issue, but this one seemed to fix itself. Now if only the flash would sync with my "shutter" when I took pics so they were not dark.