Here I will share my own experience with this JioFi M2 Wireless Router Data Card.
I bought this at approx. Rs. 2350/- but not satisfied as expected, some reasons are -
Internet Speed: About the speed of this data card is not so good as they(company) show by their advertisements, this is because Reliance Jio is not offering the good(as 4G) speed from their end so, how can you get a good 4G speed in your router or any device?
Connection Reliability: As mentioned above the network coverage of the Jio is not well in many locations(like mine) and also you cannot use it for other operators or ISP companies 4G sim and their data, already JioFi M2 is locked and may not be unlocked easily(like CDMA) so I think it would be useless to you if you don’t get good network coverage in your location/area.
Service & Support: Service of Reliance Jio is good but sometimes they noticed many problems about network and don’t take a useful/hard step for services.
I submit a request about network connectivity and they noted down and forward my problem to their head by email but still it didn’t resolve and facing that problem till now.