Device makes random noise (Unique noise, never heard of before).

[AC Question]

My Samsung Galaxy s6 makes random noise -a unique noise, unlike any sound i have heard before. This can happen randomly at any time. However, i have noticed that, blowing into the charging port also seems to activate this noise. Most of the time, the noise is followed by a 'Device connected to a dock' notification, but this may not always be the case. Sometimes, it's just the noise. For eg: My mobile woke me up in the morning at 3 AM with the same noise (no notification).

This issue surfaced 2 days ago. I have tried almost everything: cleaning the port, putting the device in safe mode, disabled NFC...and various other applications, but to no avail. Can someone help me identify what the issue here is? is it a faulty charging port?

 

[B. Diddy]

Welcome to Android Central! It sounds like the phone thinks it's docking. How did you clean the port? Use a can of compressed air to blow it out.

 

[Gigstik]

Definitely NFC trying to connect. Does the sound repeat over and over at random times, similar to the sound when plugging charger in or out?

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