My iphone 5s acts like there is no data connection when I connect it to any wifi network. As soon as I turn Wi-Fi off, it functions normally. Happens at my apartment and my office. These networks both worked on my iPhone 4. Rebooting it fixes the problem for maybe an hour, but it always comes back. I can't get email, imessages, look at facebook, instagram, websites, etc unless I turn wifi off and use LTE. Anyone else have anything similar or know of any fixes? I'm going to the apple store tomorrow but they already replaced my phone once for randomly restarting itself (this one also does that, but I think less often) so I expect them to give me a very hard time about it.