Think I'm getting the exact same annoying beep noise. Only happens when I unlock the phone. I have touch sounds and screen unlock sounds off...but it still persists!!
My phone is doing the exact same thing. I have turned off the sound for the lock sceen and the other suggestion that was put on here. Still the same beeping noise. It is very annoying. Some one please help.
Ok, so it looks like it is the NFC. Today I was using a new case with a credit card compartment. I got a new crypto currency crdeit card with an NFC chip in it and put it in the compartment with my travel ID as I flew accross the country. All day I was getting this beep sound when unlocking my phone with the fingerprint id. As soon as I removed the card, it stopped!!