I am using this device since 3 months and I am satisfied with this gadget.
Let me start with Specification:
1.It has 5 inch 720p display with 294ppi.
2.it comes with snapdragon 430 which is octa core processor
3.Battery 4000mah
4.Camera 13mp rear and 5mp front with flash
5.Sensors: Gyro, proximity, light, accelerometer
6.Hybrid sim slot
7.it has 3gb ram and 32 gb internal memory
Let me give you my opinion
1.it is handy and slim and looks good in hand but I recommend you to take a silicon cover
2.Sound is good but it is not that loud
3.call quality is acceptable but sometimes speaker does not work and you need to restart the phone
4.Data connection : you can easily use your jio sim since it is a true 4g phone and volte enabled.