My A15 has started ‘playing’ what is an unidentified and somewhat random notification. It only plays after the phone has been laying on its back. After picking it up it starts in a random fashion and may occur up to 30 - 40 times in succession but with no discernible pattern. It is two note (de-da) with vibration. There is no pop-up or other evidence of it having occurred. During sleep time (23:00 to 08:00) it is vibration only. The two note sound doesn’t match any notification option in settings menu. I haven’t knowingly changed any settings. Can anybody help please?
p.s. I just noticed that when it happens while watching video clips in FaceBook the clip momentarily pauses…..
