Angry Birds Magic
Angry Birds Magic is a special version of the game that's designed to be played on phone with near field communications (NFC). The game starts with five normal levels. After that, though, you need to do one of two things to unlock more levels:

One, you can find someone you know who also has an NFC-enabled phone. When you touch phones with that person, five more levels are unlocked. Find more friends, unlock more levels.

Two, you can use NFC tags ... but you have to find them first. Nokia, which makes NFC-enabled phones and is the exclusive provider of Angry Birds Magic on its Nokia C7, will be giving hints about where to find these tags. So stay tuned ...