Or0b0ur0s [OP] 1 points 1y ago
Buttons, yes, I've ruled them out. That's what I thought it was at first, but it isn't. The phone was flat on the table and nothing & no anatomy was anywhere near the buttons when I did my testing.
Now... the head/face detection thing, I'm not sure. Doesn't that use the front-facing camera? I wasn't touching the screen anywhere near that. If it merely took a sustained touch, as if it were touching your face, that would have been easy to discover.
I have all calls set to default to Speaker, so if there were such a thing, I'd hope that it only turns speaker off, not actually lowers the volume. And it's not coming back afterwards unless you use the buttons (which is difficult for her to do). But I'll try to devise some tests with that in mind. I'm not sure what else I can do.