What is this Bluetooth warning?

[AC Question]

Have an HTC one M7, running android 5.0.2. Occasionally I get a pop up from Bluetooth service saying phone is visible to other devices. Pop up goes away, but typically pops up again with a different port number. This happens at random times and when I'm not doing anything associated with Bluetooth. Have I been hacked?

 

[B. Diddy]

Welcome to Android Central! Is Bluetooth on all the time?

 

[Robert DeLisle]

Yes, I have bluetooth active such that my phone will interface with my car when I'm driving. This seems to work fine, but occassionally, I get this warning or infobox popping up that seems rather ominous. Maybe not so much, but it just seems uncomfortable. Here's a screen shot of what I see:

 

[B. Diddy]

See this guide, and see if you can turn off the Bluetooth FTP Server option: HTC One max User Guide

 

[Robert DeLisle]

Good find! Unfortunately, I don't have an "Advanced" option under my Bluetooth settings. I looked at the HTC One m7 user guide and didn't not find any information about FTP file transfer settings.

 

[B. Diddy]

What do you see in the Bluetooth menu? Also, do you have any 3rd party apps installed that deal with Bluetooth file transfer?

 

[Robert DeLisle]

I only see Scan, Rename this device, and Show received files. No Advanced option that I can find anywhere. I don't recall installing any 3rd party file transfer apps, but I do see Bluetooth File Transfer app installed in my list - who knew? I've just gone into the settings for that app and found an option to disable the FTP service to start automatically. We'll see if that stops it.

In a very round-about way, you have (hopefully) led me down the right path to resolve this. Thanks!