Jio has started a new service where balance or no of minutes remaining flash on screen called class 0 message.
This is a salient feature of 4G technology like ussd was in gsm/3G. In UK 4G only operator EE provide similar service.
Though this initiative from Jio is good. However this should be optional & Jio itself must convey users way to stop/start this service. Because in phones like iphone these messages turn on the screen display indefinitely costing valuable battery usage.
For Now Jio is showing mins for no of days. Like in above screenshot 179+ days are left if we convert minutes in days implying unlimited voice usage without any FUP.