this morning I opened the camera app to take a photo and the lens seemingly will not focus. It blurs and stutters and just stops with a blurred viewfinder. I tried swapping the camera view to square etc and it does the same. It's like it's constantly trying to focus and just can't. When I load snap chat it is perfectly fine. The front facing camera also won't focus. Anyone else experienced this? I can't 'prove' it's doing this til later as I'm in work at the moment but need to know my options. It's a hassle to return it to Apple (it's bought outright from them) but will they even have stock to swap it for a black 7 Plus? I'm in UK. Thanks in advance.