I purchase sony xperia c last year.Till now it work fine the speed of processing is all satisfactory. But there is one issue I observe that We cannot download more applications because of its low ram or internal memory.
there is no upgrade software to change its OS say(Jelly Bean)4.2.2 - Lollipop 5.0.1.
So that I have to use older version of android. My friends are using upgraded version and I m using older one.
If u look towards front camera which is a VGA camera, its quality is very bad. Even in good light image look pixelated.