So [Oliver] set out to use a microcontroller to brute-force the EFI PIN. You can read his back story at the link above. He had the chance to enter a 4-digit pin before the format process.

But if you prefer the ease of using a PIN, switching to a six-digit PIN is a smart move. Here's how to set it up on an Android phone. Open the Settings app on your phone. Go to Security > Screen Lock.

Learn how to enable a Screen Lock and Change PIN on the Signal messenger app to better protect your app and the messages in it.

Every smartphone user should have a lock screen password/PIN/pattern set. If you don’t, stop reading now and set one up. Seriously. Set it up now. I cannot tell you how many times I have been ...