Hi, my wife and I both have s4 minis. GT 19195 versions.
We're having some real problems that are getting annoying. The battery was draining fast so after some research I've disabled location services as it appeared that was using a lot. Seems better now but not an ideal scenario for a smart phone is it!
The main problem is that my auto screen brightness and screen rotation keep turning themselves off. A this time of year, it's really annoying stepping outside into the sunshine and not being able to see my screen. Any ideas??