Sony is a brand loved by all of us .But this time not. you guys go to hate that brand sony.Because this prosser when compare to other smart phones like samsong and othere wich are below 13, 000 rs are so good .But this much of coast it was really waste and only one pless point water proof , and the bad is if you open your sim slot which made woth lebber the water will flow inside the phone .even .over heating is the biggest probleam in it .u cant even hold that for 10 minties and at last my sajetion is go with sony c4 .dont buy m4 becuase waste of money to bad to use compare this phone to other only water proof and dest is only + point u will find.