How do I stop the alarm on my Samsung S5 from going off randoml?.

[AC Question]

Ay random times on random days my phone starts playing a generic alarm. I have no alarm app. I have alarms set through the clock an they work fine. I have found the only way to stop the noise is turn my phone down. To stop it completely I have to restart my phone.

 

[B. Diddy]

Welcome to Android Central! Is that alarm tone definitely one of the preinstalled tones? If it's different, it might be the NFC tone, which can be triggered if the phone's NFC chip detects another chip nearby (like in a credit card).