Reliance Jio Infocomm — no network connection in bangalore

Address:

530002

I am from visakhapatnam and i have jio number and i traveled to bangalore last week.
I have faced big problem at bangalore as there is no jio network. I couldn't get any phone calls or mail or vedio call.
Please let me know why it is so.
Next week again i have to go to bangalore.
I don't want to face same problem again.
If you don't have network in bangalore surrounding, i will have to take airtel or another sim.
Please clarify