Xiaomj redmi 3s is best phone under 7000₹ budget. I have this phone from august 2016 and I find everything okay till now. Its comes with latest android marshmello update and latest MI software. All music formats are supprotable with excellent sound quality but volume is slow. It is slim and look similar to iphone 6. Xiaomi had covered all ranges of feature in this phone. Under 6999 you can get 2gb ram, 16gb rom ( expandable upto 128gb) , octa core processer, 13mp rear and 5 mp front camera, hd screen, and lots more. Its back is made up of metal which is reliable. I had fallen down my phone so many times but does not cause any harm effect. So we can say that phone is reliable. It is best phone undet 6999₹ and just go for it.