I have personally used this. The speeds are pretty good, and it's easy to start using it.

  1. Enter your mobile number to receive an OTP
  2. Type the OTP.
  3. Connection is established.

I don't understand why some people are being so negative about this. It's a good quality service being offered free of charge. I can imagine a number of scenarios where it can be a life saver to have dependable internet at a railway station.