Anyone else experienced this. Had 5S for 3 years but when switched on earlier asked me for activation lock code and Apple ID and password. And started with checking what WiFi to link to. With a list of wifi networks in a format I've never seen before. Never done that before. What's that all about? Not a virus is it? Anyone got any idea why? Not updated to iOS 10.2 yet. On 10.1.1 and its the sort of thing that happens when you do update?