Security News > 2023 > June > Aussie PM says, “Shut down your phone every 24 hours for 5 mins” – but that’s not enough on its own
Simple things, turn your phone off every night for five minutes.
Shutting down generally closes all your apps, then closes down the entire operating system, thus stopping any malware or spyware that was active in the background, along with everything else.
If that's how the attackers choose to do it, then religiously rebooting your phone every day will give you a false sense of security, because it will feel as though you're doing something really important and useful, even though you aren't.
Rebooting your device doesn't "Reboot" the logged-in status of the apps you use, so your phone starts back up with all your commonly used apps automatically reauthenticated to their respective online accounts, unless you previously logged out deliberately.
If you genuinely don't need your phone at all, consider powering it down completely until later, just as the Australian PM suggests.
Don't make it easy for a crook who steals your phone to take over the "Phone" part of your digital life simply by swapping your unlocked SIM card into a phone of their own.