Hi, I have been using xperia c5 ultra dual since one week, I have been observed that battery was drain very fast and taking more than 10 hrs to full charge. Getting heat very fast when its under charging and when use camera more than 5 snaps. but camera picture quality is good. Always Ram is full. and when we use 2-3 apps continuously. as per the specifications its 2GB but system is using 1GB of the ram and inbuilt app are using 400MB of Ram. for user they are giving 400MB of ram. overall I would say mobile is lagging (getting slow). some times giving good performance. for charging it take usually 6 -8 hrs to get full charge.(its very long time as compare to other mobiles) I think it requires few updates to fix all the problems. could any one tell me why mobile is getting slow suddenly. and how to fix all these problems.