I was using 3g mobile thats why I buy jiofi m2 wireless router and I am satisfied customer. If I say about thier battery back-up it’s not good that should have to little more.if I sayed about coverage of this router is average. I like one thing in this router is that it is able to connect 31 device’s but that product have some issues like that goes offline some time when I connect to mobile and show that messagereconnecting it’s irritating.and also many time disconnect during call which is not good.