RingJini on Jio
Being tested Jio forwarding hasn't been checked on a real phone yet. The beta form records your network, and we'll write to you when Jio passes.
What we expect
Jio has its own forwarding codes, different from Airtel's and Vi's, and sometimes needs activation through the MyJio app rather than a dialled code. The app will show the right codes for Jio once they're verified.
The MyJio route
If a dialled code is refused, forwarding can be set in the MyJio app: Profile › Mobile settings › Service settings › Call forwarding, where you enter RingJini's number for the “not answered”, “busy” and “not reachable” cases.
Known limits
Jio doesn't forward to some kinds of number (BSNL numbers and international numbers, for example). RingJini's numbers are ordinary Indian numbers, so this shouldn't apply, but it is one of the things the test checks.