Help Smart Lock on LG G4

[Ivan Berger]

I have an LG G4, model LGUS991, running Android 5.1.

Smart Lock used to work when I was at home or close to either my smart watch or car infotainment system. Now it's stopped, and I can't restart it.

Lock Screen/Screen Security/Smart lock says "Keep phone unlocked with trusted device or place." It show on-bodyy detection as on, my home as the trusted place, and my trusted devices as my smartwatch and both cars' Bluetooth systems. None of these work, however.

Security/Advanced Settings/Trust Agents shows only "Smart Lock (Google)" which is toggled On.

 

[svim]

Have you tried restarting your G4 to see if that makes any difference? That's always the first to try when these kinds of odd little glitches pop up. At least you know you have a real problem to look into if it still occurs after rebooting.
If Smart Lock is still not working, try going back into your Settings >> Security menu and re-configuring all those Smart Lock options from scratch again.
https://gadgetguideonline.com/android/lollipop/how-to-use-smart-lock-in-android-lollipop/
Another thing to try is restart your G4 into its Safe Mode and see if Smart Lock is working again:
https://www.hardreset.info/devices/lg/lg-g4-us991-us-cellular/safe-mode/
While in Safe Mode your phone is running just the base Android operating system, no third-party apps/services get loaded during the boot up process. So just about every app you try while in Safe Mode will take longer to start up as nothing gets pre-loaded beforehand, but if Smart Lock is functional again that would indicate some app you've installed is interfering with it. The problem then is diagnosing just which one but at least its a start to solving what might be going on.

 

[Ivan Berger]

Thanks!
Rebooting never had any effect on this problem, but Safe Mode did the trick.

Now, however, I face the problem of uninstallling my many apps one by one to find which one is causing it.

Any idea what types of app (communication, music, photo.....) I should try first?

 

[svim]

.....
Any idea what types of app (communication, music, photo.....) I should try first?

Not sure just what app might be creating a problem with something like that Smart Lock service. Given that Smart Lock is a part of the Android install itself than whatever app is the potential problem will be a little more involved to find (you'll need to restart your phone a lot more while diagnosing the situation.). You could try uninstalling a bunch of apps you've installed, restart, and see if that solves the problem but you might want to instead try disabling a bunch of apps (in groups you intentionally select -- i.e. apps starting with A to H), restart your phone, do a test, and see what happens. Then enable those apps, disable another group, restart, do a test, etc. until you find the target group and then go on from that point, until you find the culprit.
Once you do, it might not be matter where you need to uninstall that app (if you really like using it), experiment with its Permissions or Notifications settings and see if that makes any difference.

 

[MoodyBlues]

Any idea what types of app (communication, music, photo.....) I should try first?

I'd try a different approach: start with the most recently installed apps.

Since Smart Lock used to work, an app you installed recently--if you did--would be my first guess as the culprit.

You can view your apps in date order, with the most recent first, by going to your My Android apps Play store page using a browser. See if that helps.

 

[svim]

I'd try a different approach: start with the most recently installed apps.

Since Smart Lock used to work, an app you installed recently--if you did--would be my first guess as the culprit.

You can view your apps in date order, with the most recent first, by going to your My Android apps Play store page using a browser. See if that helps.

That certainly is a viable, different approach to take, just keep in mind it doesn't have to be a recently installed app but the problem could be due to an update applied to an existing app.

 

[MoodyBlues]

That certainly is a viable, different approach to take, just keep in mind it doesn't have to be a recently installed app but the problem could be due to an update applied to an existing app.

Yes, absolutely. Since we're dealing with such an old Android version, this is very possible.