Why enable it
Two-step verification asks for an extra password when signing in on a new device, so an intercepted SMS code alone is not enough.
Setup
- Settings → Privacy and Security → Two-Step Verification;
- Set and confirm a password;
- Add a recovery email (strongly recommended) and a hint.
If you forget it
- With a recovery email: reset by mail, usually instantly;
- Without one: wait about seven days before resetting; new logins are blocked meanwhile;
- After a reset, all signed-in devices are logged out.