I am using this smartphone from a long time almost 8 months on the 3rd monthit gave me some system UI problem to solve that problem I had to factory reset my phone but it is solved now after aprox 1 month I got an update and that problem was totally solved and now I am using this phone I am loveing this UI not it is rolling on marshmellow 6.0.1 I am loving it this is recommended to peoples just have a look on it u will like it and camera is realy good and the batery backup is beauitfup 5000 mah batery I last 2 days after putting the phone on UPSM the sliding button on the left top no lag 1.5 ghz octa core processor with 2gb ram 13mp rear and 5mp camera at front quick charge 2.0, 5 finger prints can be used for unlocking I love it