Now a days jio user increasing very fast and lots of people using jio4g service but this function of jio not working correctly I am using jio from last three moths but now the jio4gvoice service not working properly I am very frustrated while its hangingup and the screen showing same and not able to call with this over all jio service is good but if yoyu talk about this perticular service then please thing before using this make a call from inbuilt fone application that will better then this 4g service .