M-209 cryptographic device.

Cybersecurity Basics:
Protect Smart Phones and Tablets

Simple Protection for Smart Phones and Tablets

Set up a strong PIN for identifying yourself when you talk to your provider. There is a form of attack where the criminals transfer your phone to a different provider. That's the first step in taking over your number, so they can convince your bank that they are you. The attack is called a "port-out" scam or "SIM swapping". Contact your provider and say you want to increase the security on your account. Here are specific carriers' advice for protection. Some, like Sprint, don't have much useful information on-line:
AT&T T-Mobile Verizon Sprint

Set up as long a PIN as you can, making it a random number that has nothing to do with your bank PIN or other authenticators. Use a password manager (details later) to generate and remember this for you. You shouldn't need to use it very often.

Set up a screen lock. A PIN is best. Turn this on in the Settings menu on either Android or iPhone.

The pattern you draw with your finger? Unless you are meticulous about cleaning your screen and replacing the screen protector frequently, someone can easily see how to unlock your phone by holding it up to the light.

Face recognition sounds fantastic, but so far it's only so-so in performance. It has significant error rates, both false reject (locking you out of your own phone) and false accept (allowing access to someone else because they're "close enough").

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