Green phone Icon in iphone 13 when I touch it blinks a black screen.
When someone calls me and i try to access the speaker page I can't. I touch the green icon and it blinks a black page and goes right back to the home screen with the green icon at the top left. I try this every time I receive a call because 1. I am hard of hearing and 2. I am very very hard of hearing. Please help. I have tried turning my phone off and back on rebooting. ect
iPhone 13 Pro