Very frustrating problem I need help with. I just bought the Note20 and it is having the exact same problem as my S7 Edge. That is, while on a call, no matter if the phone is at my ear or on speaker, the keypad turns off after about 10 seconds. I have to hit the power button or double tap the screen to get it back on. This is highly, highly irritatiing and inconvenient. I need the phone to stay on the whole time. I don't care about wasting the battery.
I have, in the past, read all the forums and tried all the setting options. Nothing has worked.
So to summarize, I need my phone keypad to stay on for the duration of the call.