Submitted by John Boxall on January 7, 2007 - 3:41pm.
To use an MP3 player to listen to a song would you rather press 'Play' or 'Ok'?
While many mobile phones tout themselves as MP3 players very few provide an obvious dedicated 'Play' button to listen to music. In a world where convergence is king this damaging oversight seems down right embarrassing. It just doesn't seem easy to listen to music on a mobile phone. If phones are ever to have a hope of one upping traditional MP3 players then it's time to get designers back to the drawing boards.
Designers face a clash between two seemingly conflicting interface design heuristics. An interface should be as simple as possible, of which Google's homepage is the classic example. An interface should always provide controls to do what you want as quickly as possible, everything should be just a click away, you shouldn't have to think about it. Of course current cell phones can do a lot. To have everything close at hand would be impossible without breaking the first heuristic by introducing a huge number of new controls. Balancing the two has become a problem of providing relevant generic controls. We can all recall a horror story of trying to set a car clock.
Mobile phones provide functionality above and beyond what typical MP3 players are expected to do. Though most phones have some space for additional buttons, they can only be added at the risk of overwhelming users. Instead phones tend to err towards simplicity in that they provide a handful of standard controls which cater to the lowest common denominator of functionality. An 'Ok' button is useful in many circumstances so it is provided as a one size fits all method of addressing most actions. MP3 players, cameras and all manners of devices have controls specifically designed to make them easy to use. On an MP3 Player, an 'Ok' button is far less useful than a 'Play' button in this regard. On a MP3 phone how can designers provide controls both for media and call functionality without making the device too complex?