I am issues with call waiting not working. I normally received text message for missed call. I used to have call waiting working perfectly on the same phone ( redmi 6 pro)
With 3 network. When I changed to o2 and transfer my old number to o2 I discovered that the call waiting not working again. I have chatted with guru, checked Google and did all possible ways to enable the call waiting. It enabled but not working. Is the problem as a result of puking my old number from 3 network to O2 ?. Please I need help.
