This vivoy21l mobile is very good to use. The cost of this mobile phone is affordable to any one. Particularly those who want to use 4g mobile for those people this mobile is very good option for them. The battery is very good in this mobile it will last almost 8hours.This mobile is very speed. Internal memory and ram is very useful.backcamera and selfie camera quality is also very good.Touch pad is also good. Service facility is there to public. So recommend to use this mobile