The next time someone asks who´s on the line, you can say it´s Bono, because 2005 is shaping up to be the year of the music phone. Previously, phones that played music had limited storage, and queuing up a song was cumbersome. But as carriers roll out MP3-friendly high-speed cellphone networks, phone manufacturers have been inspired to boost memory and design phones with dedicated play buttons, built-in speakers, FM transmitters and graphic equalizers. In other words, they´re functional MP3 players.