Incoming call display problem.
When I get an incoming call on my Cubot J7 phone, it does not display the incoming caller ID.
Nothing at all appears on the display (apart from the tiny 'phone' symbol right at the top of the display).
I don't get any 'answer' options, so I cannot answer nor reject the call.
This happens whether the phone is locked or unlocked.
I am running Android version 9.