As per the buzz, the site http://magicapk.com is the place where you can find the User details of any Jio Customer.
Already the domain is being slow and will soon be removed. Go check if yours was leaked too before it is removed!!!
All you need is the Jio number and you can find some personal information of the Jio User that were submitted during the registration.
Also in some cases, even the Aadhaar Number of the customer could be seen though it still varies from case to case.
It is the biggest data breach that can be expected in India. Go find check yours at http://magicapk.com. If not found at once try submitting the same from 5-6 times to get the information.