As with everything an investigation will be done and it will show that nothing has happened.
Another thing to ponder is that a company (mobile operator itself) has all the data like fingerprints, iris scan etc. It can utilise those in a bad way.
Many sensitive data is leaked like aadhar card. Jio is using reliance infrastructure which is not secure. Hacker find a bug in server hopefully jio block domain last night. Other telecomm operators like Airtel, Idea try to fire this issue and use it for own profits.