@Dhiraj i too ported from airtel to jio, yes you need a new qr code. if you dont have one then you need to do a full hard resent of your mobile then you will get a new code
ps : i seen jio engineer doing this for people who wants a new code for porting :emoji_blush:
To make outgoing calls,yes.If you are not going to ,you have a period of 90 days to recharge after which your number will be suspended.is minimum monthly recharge required in prime membership?