Xiaomi redmi 3S is all mobiles father in battery backup. It’s battery is a 4100 it’s such a good job.it’s running 1or 2 days easyly. And it’s 4G supports in the first and second both sim. But ek chiz jo muje bahut buri lagti he vo ye ki ye phone garam jyada hota hai baki mobile ki comparision me. Or itni kam dam me usme fingerprient lock bhi diya gaya hai or 3gb RAM and 32gb internol storage jo ki bahut achha hai medium aur garib logo ke liye. thank you ????????