As I already mentioned Sony is highly diversified. One of their businesses inlude mobile communication. While Nokia is still the market leader in terms of cell phone sales - Sony Ericsson could capture chunks of market share from others.

Sony Ericsson´s mission is to establish itself as the most attractive and innovative global brand in the mobile handset industry. They are innovative and also attractive for sure.

Check out this --> http://www.youtube.com/watch?v=bJkEAdVDHD8

PlayNow+ is a new Sony innovation which makes acess to music from all over the word easily from your cell phone. With PlayNow+ you can download music as much as you want with no extra charge. I think Sony is heavily investing in new technology and using their existing products to integrate music downloads and also providing entertainment. Entertainment and consumer electronics is also their core business.