https://www.desidime.com/discussions/should-i-port-in-airtel-from-jio?page=1#post_5680596
deb4O5
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using jio from 2017 end till today .. Only I get issue while travelling and sometimes in a day . as far as Jio voice qualify is unmatchable so far . sometimes I face issues in Calling in Jio . i am from mumbai ..
Have a secondary connection of Airtel with maintaining some minimum balance for making calls in emergency, forward calls from current Jio to new Airtel.. so that you won’t miss incoming calls when you are out of Jio network.
If you get stable Airtel network then go ahead…
if you only need as backup number, consider BSNL