Samsung Galaxy emitting constant beeping sound My Galaxy (A8) is emitting a constant beeping sound every few seconds. I tried the following, per various online suggestions:


Wiping the cache (by entering into recovery mode)
Closing all applications
Reset the device
Update the firmware (there was a recent FOTA)


Any suggestions as to the cause or the ways to solve?
After further investigation, the issue turned out to be that a card with an NFC chip was interacting with the NFC receiver in the phone.

While there were no open applications, this still caused a constant beep every few seconds. Removing the card, or disabling the NFC, both solved the issue.