I have purchased this smart phone for me.its adorable function and features .it is very fast 2550 MAh Li-Ion battery. Battery backup is good to another smart phone this price range. No hunging problem Vivo v3 4g LTE enable mobile .we are also used to reliance jio in this smart phone.most is fingerprint scanner used. Primary camera 13 MP and selfie camera 8MP. both camera is good. Display size is 5 Inch HD. Looking is perfect for my hand. But 2nd sim card slot is neno sim card or micro sd card .I also use neno sim card. good exp. & Happy to see manufacture in india Vivo