1.. you have to download device id changer and activate modules in xposed installer.
2..open device id changer and random all values and apply it.
3.. no need to switch off your mobile.
4.. off ur net and open my jio old apk.
5. now u have see get jio sim.open data connection and click on get jio sim.
6. now repeat 2 to 5 again and again to generate unlimited brcodes