Camera problem since upgrading iPhone 5s to iOS 9
I've an iPhone 5s and since I've upgraded to iOS 9 (now I have 9.1) my cameras front and rear have stopped working and the screens appear all black, hard resets and all don't work. I did a restore yesterday morning and they started working again for 24 hours and in the passed 20 mins the cameras have stopped again.
Now I don't know if this is a software or hardware problem. If I go on snapchat it's all black but I can't take a photo.. Surely enough if this was a hardware problem I'd still be able to take a black photo, if I go into the camera on whatsapp the app crashes so this is making me believe it's software but I really don't know. Has anyone else experienced this and have any solutions?
iPhone 5s, iOS 9.0.1