I bought this device, as im not able to afford money for costly 4g mobiles.Im writing this review after usage of 1 week by my samsung star pro. I bought this in jio store with the price of 999₹. Means its saved money of atleast 6000 to 10000 rupees. It is working very smoothly without signal drop and wifi less coverage. As it has 2.5Ghz signal strength, we can use mobile device within range of more than 15 metres. Battery backup is very good as I’m getting 6hours in continuous usage. No need of buying costly 4g phones if you have this jio fi hotspot device with you.