Phone stays unlocked after talking on the phone using Bluetooth headset

[Charkatak]

Hey,

I have already made a similar post a year ago when I had my S22 and now the same story with S23. 

Here is the scenario: My phone is connected to a Bluetooth headset.  I initiate a call and have a conversation for some time and in the meantime the phone's screen times off as it should.  After that, I hang up and go on with my life.  Then later I wake up my phone and find that it doesn't ask for a pin or a fingerprint.  This issue was present with S21, S22 and S23.  

It seems that the phone remembers that I unlocked it to start a phone call but doesn't relock it when screen times out.  If not using any Bluetooth headset during conversation, the phone will re-lock itself as designed and ask for a pin the next time I wake it up. 

Smart lock is off.  The issue didn't happen recently after an update, so it is ongoing for years.  Restarting of the phone, won't help either.

This is a big security concern and still to this date there is no resolution.  A year ago I tried to use "error reporting" feature to report this to Samsung, however it didn't get any traction...

[DanG92263]

Make sure that the Bluetooth headset is not listed as a Trusted Device in Settings

[Charkatak]

I did extensive testing and this is what I have discovered: when I use Google phone app with Bluetooth headset and after finishing a phone call (I hang up or the other party) the screen doesn't wake up. I believe when screen doesn't wake up after a call, the phone stays in an unlocked state.

Alternatively when I use Samsung phone app after a conversation it does wake up the screen and then after the screen time's out it asks for a pin or fingerprint.

[DanG92263]

Good sleuthing. I don't have many calls, let alone on Bluetooth, so I haven't noticed this. Hopefully this can be corrected in the coming update.

[Charkatak]

I also sent Google phone app feedback with system log files