Not everyone in the market for a retro device will find the Nokia 2720 Flip appealing. Yet unlike the Nokia flip phone, the Commodore Callback doesn't allow users to access social media apps or a web browser via the phone. However, a truly retro phone wouldn't let users take impressive photos or use messaging apps, limiting its value. While there are a few nostalgic items on the market for audiophiles who miss dedicated mobile MP3 players, not everyone looking for a classic flip phone will also be yearning for the days of the iPod and Zune. Because of this, the capacity to play HD audio is a smartphone-era feature this retro device still offers.