When I am using koi primary sim I face many problems with sim because of that my friends tried to call me on my primary number but it not reachable most of time and error occurs full of day. Jio is the bad telecom company and service also bad.
Jio sim we can’t use it without internet for calling purpose.
I throw the sim from primary slot and I can receiving my important call at time .
Network not also good.
Finally I advise you if you have need internet and calling more and more then use it.