One year ago, I bought this small device. The design of this device is very elegant. It is very smooth to open its back cover. While you press the on button, which is located on the top of the right side of this device, its going to show you the indicators of wifi. Blue indicator: It will show you good speed. Light green indicator will show you average speed and if red indicator appears then it means your wifi needs a recharge or its getting low signals.
You need to take one sim of Jio. Jiofi user can recharge this device by Jio website or can download its app. For the first six months, Jio will provide you unlimited data. After that, you can recharge with different plans according to your comfort and budget. The device cost is 1500Rs.