The Reliance Jio create sensation in telecommunication department. They are mostly know an used in 4g enabled handsets but if you do not have the 4g phone then you can use this device if you have wifi option available. It works only on jio sim so you cannot use other operator sim. Internet speed is superb this spees as same if you use jio sim in mobile.
The battery is good it can last up to 5 hours if fully charge. but it can use as portable device you can get it where ever you want. You can charge this device with power bank too. So it is very much efficient. The connectivity of this device is good. Some time fkucuating but you can negotiate it as look at the speed you get in the 3g or 2g phone.
The service and support of jio is also good. As per to my opinion this is a very good device.