XIAOMI REDMI 4 IS A VERY NICE I OPERATED THIS PHONE SO THE SOUND QUALITY OF THIS PHONE IS VERY BETTER FOR EAR IS NOT OVERLAPS TO HIGH BASE THIS PHONE IS BASED ON ANDROID SO ITS NOT TO DIFFICULT OPERATE STYLE OR DESING OF THIS PHONE IS SIMPLE BUT BACK SIDE IS SO GOOD LOOKING SPECIALLY BACK CAMERA BUTTON THIS PHONE HAS HIGH CAPACITY TO DATA STORE MORE THAN 32 GB INTERNAL AND 128 GB BY SD CARDS LONG TIME BATTERY LIFE CAMERA QUALITY ITS SO GOOD IN NIGHT ALSO THIS PHONE IS AVAILABLE IN MULTI COLORS SO U JUST BUY YOUR CHOICE THIS PHONE IS AVAILABLE ON 9000 RS ONLY SO THAT IS REALLY GOOD NOT SO COSTLY