It is a very good device for those who donot have a 4g phone and wants to enjoy the jio services. I have used this jiofi from quite of months and I am satisfied with its speed and reliability.In this device the jio internet speed comes very fast about 2 to 3 mbps downloading speed.By using this device we can also use the jio unlimited calling by installing the jio4gvoice in your phone. This jiofi is avvailable at a very good price i.e 999 rupees. And also we can get 6 months of free data and calling. Its battery backup is also good easily last for 5 to 6 hours. So I you understand and take a right decision.