If you have just bought Reliance Jio sim card, data pack for your sim will be activated soon, mostly in one day (if documented submitted by e-kyc). But voice calling or SMS facility for sim will start only after 1st you get Jio Tele -Verification SMS and after verifying by calling 1977 from jio sim.
Before getting sms about Jio Tele -Verification, you will not be able to call even 1977. So don’t try to call 1977 if you have not received the sms about Jio Tele -Verification, it will be just waste of time. Just wait for SMS. The Jio Tele -Verification SMS may come on 1st day of purchase or may come on 20-30 days after purchase of sim, no one predict for sure. You really cant do any thing to receive Jio Tele -Verification SMS fast. So just enjoy the data on jio sim. when you will get sms, than only try to call or sms.