I am using jio voice application in my iPhone 6s the application was very useful . There is some issue of call drop and As it always displays calling is disabled because phone dialler is there for calls. I have done every possible thing to start calling but nothing worked. I have also tried to update the Jio 4G Voice App but when I use internet Very Good Speed Is Like 1-4MB/ps. now’s a days I facing issue with OTP. There are OTP Verification problem or if OTP is not coming.