If you use Windows Phone 8 and want to get the new Windows Phone 8.1 hotness and give Cortana a spin before it rolls out officially—and you do, it's really great—then don't despair. Although the early access is a "developer preview," you don't actually have to write any code to get your hands on it. You just need a Microsoft Account and a Windows Phone 8 phone (obviously). First head to App Studio and sign in with the same Microsoft Account that you use on your phone. This will make some magical change to your account. Next, install the app "Preview for Developers." It's a regular app you can find in the store, or you can send it to your phone here. Then run the app. It's straightforward. It'll ask you to accept some terms and conditions, warning that you may void your warranty. If you don't want to do that, then you'll have to wait for the final release.