I am using Mi Max 2 Mobile with Jio Sim, problem is i can't make a call to All Jio Numbers even i enabled Volte option.

whenever i tried jio number, call immediately disconnected but another end they got missed call from my number. call won't be connected...

Phone Details
MIUI Version

Android Version 7.1.1 NMF26F
Model Name MDE40
Android Security Path Level 2019-03-01