mobile

My Xperia Z1 (C6903 with Android 4.4.4) suddenly does not rotate automatically (although "rotate automatically" is switched on). when i take pictures they were rotated the wrong way. If i restart the phone things are fine but after sometime the same problem comes back. what might be the problem ? how to fix it and its just 3 months old. How to get max picture quality (best setting in camera app, currently using superior auto mode) in my phone ? and also how to get more sound from speaker