LYF wind 7 is one of reliance handset which is market with jio preview offer at price 6999 onwards but now jio sim gets any lte mobile so you can gets more good mobile in same price with jio sim so not buy it at that price some feature of it are it has OS 5.1 lolipop android version upgrade to further new version. It has 2gb ram with 1.3Ghz snapdragon quad core processor and internal storage is only 16GB and expandable to 32GB.
Camera also very poor quality it is only 8MP with flash and autofocus.
Battery capacity also not so good only 2250mAH.
So you can go for better mobile available same price in market