The NSA advises you to turn your phone off and back on once a week https://www.dailymail.co.uk/sciencetech/article-13493527/iphone-android-users-smartphone-hack-nsa.html Powering off your phone regularly, disabling Bluetooth when it's not needed, and using only trusted accessories are just some of the NSA's security recommendations https://zdnet.com/article/the-nsa-advises-you-to-turn-your-phone-off-and-back-on-once-a-week-heres-why/