
You can configure Steam to require a code generated by the app on your phone each time you sign in, in addition to your password. The Steam app also provides other useful features, like a code-generating feature that works with Steam Guard to secure your Steam account. RELATED: How to Sell Your Steam Trading Cards (and Get Free Steam Credit)

You’ll have to do this in your web browser because the option isn’t integrated into the Steam mobile app, but you can always do it via the web browser on your phone. Head to the Activate a Product on Steam web page and provide the CD key or product code.


If you have a product key from a physical game or a website that sells Steam keys, you can now even activate these while away from Steam.
