This JioFi in Good for only 3G Phones. But I am using this JioFi since 6 months no face any problem. the internet speed is very good. we create own hotspot. and make calling to JioFi use only one app. connection is pretty good. battery life is also good. it is 2300(mAh) and it’s works one and half days. you have to connect upto 31 devices. and best thing is you can sharing through SD card. the jiofi service & support is very nice. I pay for this product is 1000. if you planning to buy this product and you have 4g mobile so, please don’t waste your money.