Reliance jio don’t have network in various cities. And I’m using the jio card in my phone . And when I visit some places of Maharashtra I don’t get jio sim network I can Kolhapur district jio has no Towers so if you go there you are same will be having no network . But a part of that the customer service is good of Reliance Jio but the main problem is of their network in Maharashtra few area you don’t have a single tower in your phone. So you cannot use your jio sim card there in those places. Billing and charges are low but you can use it only that time when you have network