Two-Factor authentication (2FA) adds an extra layer of security on top of a username and password. Its a free way of adding an extra level of security to Google, Apple ID and DropBox accounts. While Apple has implemented 2FA for some services it has not been rolled out completely. This guide will step you through enabling 2FA on Google, DropBox and Apple ID accounts. Well be setting up SMS only, as that will be the most compatible and cover 2FA setup process.”]