A couple of weeks ago my S7 started to make a sound like morse code 'x' at a relatively low pitch, i.e. no high frequency tone. I cannot recall having installed any 3rd party app that could have triggered this. The beeping occurs at random intervals, varying between 15 minutes and several hours (yesterday at 15:37, 15.55, 16:20, 16:39, 17:40 etc.) and is particularly annoying at 4 a.m. or so. It also occurs when the phone is on "do not disturb", which I have activated for the night hours (11pm-5am). There is no message displayed with it either, and I am unable to relate it to any incoming message, alarm or notification. Also, it is not related to NFC or any other wireless signal (WiFi, BT, SmartThings) as I have disabled them one by one, but the beeping still went on. It occurs spontaneously, independent of location (bedroom, office, kitchen, out of the house...) and is independent of the phone being moved or sitting still.
Assuming that there is nobody out there who has the same phenomenon, does anyone of you, dear readers, know of any tool which could track the origin of such beeps and thus giving me a clue as to what could cause it? Caramba, it just beeped again :-((
