This is a new issue today, so I'm not sure what triggered it. The last call I had, I kept hearing dialing noises. When I took the phone from my ear to look at it, indeed the keypad was active, not dark like normal (at least for a second till it realized I'd moved it).
I've gone into every setting menu I can find, and I don't see a command to disable the keypad, so it seems like it ought to be automatic.
Any suggestions? Thanks.