Samsung Galaxy A23 5G - Sim Card Lock; PIN Windows; Permission Manager

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SIM Card Lock
←
Settings > Biometrics and security > Other security settings >
Set up SIM card lock
Your SIM card includes information like your phone number and
voice/data plans, which can be compromised if the SIM card is
placed into another device. To help protect it, you can create a
PIN that will lock access to the SIM card.
Pin windows
←
Settings > Biometrics and security > Other security settings >
Pin windows
Pin windows allows you to pin an app to the screen and block
usage of all other functions of the phone including calling,
texting, and other frequently used apps. This feature is very
helpful if you want to lend your phone to another user, such as
a child, so that they can only use the pinned app. For example, if
you pin YouTube, it is the only function they will be able to use,
and all other functions of your phone are locked.
When you want to return to regular usage mode, hold the Back
andRecentAppsbuttonsatthesametimeforafewseconds.To
unpinanapp,youmayneedtheauthorizeduser’ssecurityPIN,
pattern, or password.
Permission manager
←
Settings > Privacy > Permission manager
Some apps, like the camera, microphone, or location services,
access features of your device when they are running in the
background and not just when you are using the app. You can
give or deny such access to each app and set your device to
notify you when this happens for each category you select.