Help weird constant sound coming frm HTC OneM9 like every 30 seconds.

[MJ Clark]

Help weird constant sound coming frm HTC OneM9 like every 30 seconds. I hv ckd all my settings and running apps.

- frm BMM

 

[B. Diddy]

Welcome back! What does it sound like? Is it different from the usual notification tones? It'd help if you took a video of it and posted it on YouTube, then shared the link here so we could hear it.

If your NFC is on, make sure you don't have something with an NFC chip nearby (e.g., a credit card, especially if you have a wallet-type case for the phone). If the phone detects an NFC chip nearby, it may play a distinctive tone.