Is there any way to pass over the country restrictions to install and use Good Lock? I got the N975F and cannot install it from the Samsung App Store because of that.
To activate/deactivate NotiStar, and keep QuickStar changes after reboot, you need Good Lock installed. You can grab it from here. After installing it, you can hide Good Lock icon from the launcher. I don't know what happens behind the scene but it needs to be that way. Otherwise, it won't work.
Fine Lock PRO is a waaaay better Good Lock alternative. It links you to APK Mirror, notifies about updates and even gives some really good advice, advice I'm copy-pasting here:
Have fun! https://finelock.app/
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