Originally Posted by GuitarG20
Do you have NFC turned on? Is it perhaps near your wallet, with a NFC credit card, or near a NFC tag?
I had a mystery notification sound every time I unlocked my phone, even though the unlock sound was turned off.
Your comment made me realise, I have the badge to enter my building in one of the card slots on my phone cover, which must have NFC.
I turned off NFC and it stopped bleeping at me...