[iDevice] FREE Spotify Premium on your own account

I'm pretty sure that some people know this, but it's possible that some people don't. Thought I'd share my first methodon here with you guys. Here's how to get all Spotify premium features EXCEPT downloading songs on your iDevice. Everything else like skipping, no ads, high music quality, is available.

Requirements: iDevice.
Jailbreak/ PCis not needed.