So I currently dropped my cell service and am using my iPhone 5S with nothing but wifi and I've starting noticing that my phone drops wifi when the phone is locked. This can't be normal right? I was under the impression iOS devices remain connected to wifi even when the phone is locked, so you can get updates or notifications in the background. Has anyone else experienced this? It's annoying because my phone will be locked and I won't get any messages until I turn on and unlock the phone.