How do I set up two-factor authentication?

Open Settings, then Security, and turn on two-factor. Scan the code with an authenticator app, type the 6-digit code it shows, and save your recovery codes.

Phone app

  1. Tap your profile picture at the top of Home, or swipe in from the left edge, to open the menu. Tap Settings.
  2. Tap Security, then Turn on two-factor.
  3. Scan the code with an authenticator app (or tap Copy the key).
  4. Type the 6-digit code from the app.
  5. Save your recovery codes, then tap I have saved them.

Desktop app, Website

  1. Open Settings and click Security.
  2. Click Add an authenticator app and follow the steps.

If you lose your phone, a recovery code gets you back in. Each code works once.