One of the best selling Smartphone company in 2017 is Xiaomi. Xiaomi Redmi 3S Prime is one of the best flagship smartphone with two variant. One is 32 gb internal memory with 3 gb RAM and another is 16 gb memory with 2 gb RAM. I have been using 32 gb variant last one year and I strongly recommend that this phone is best budget phone in this time.Redmi 3S Prime have 4050 mAh battery which is awesome battery back-up. I usually use 2 days long after full battery charge. This phone camera is good. It has 13 mp rear & 5 mp front camera.This phone have one fingerprint scanner in rear side. This scanner have quite good but it has problem some time when I want to unlock the phone by fingerprint scanner. But it not come everytime.I think it is very good smartphone for longtime using.