After the introduction of two new mobile phones for the US market, the Z750 clamshell with a 2 megapixel camera and HSDPA for Cingular and the W580 slider phone with advanced music capabilities, it looks like Sony Ericsson is already planning to release several more handsets and the manufacturer's execs claim that this is just the beginning of the announcements this year.

Reportedly Sony Ericsson will be developing phones that work on the new 1.7 Ghz AWS frequency band, that was bought by T-Mobile during last year, in order to support the mobile operator. Similar declarations were made by Nokia and I-mate who are also producing mobile phones that will work with T-Mobile's MyFaves interface.

Sony Ericsson will be expanding its phone line in the US with the company's "largest set of devices for North America ever," Sony Ericsson president Miles Flint said at the CTIA trade show.

Moreover, Sony Ericsson will bring more innovative software onto their handsets for the US, as carriers become more comfortable allowing Google's Blogger platform. While Walkman phones bring excelent music quality, they've somewhat fallen behind when it comes to syncing music with PC. Sony Ericsson execs have also mentioned that PC software will get a 'big revolution' throughout this year and provide music syncing and added video syncing with PC.

Support for Microsoft protected music, such as music from Napster and Yahoo! Music stores is on the company's roadmap as well. Mobile phones carrying the Bravia band will also be introduced on the US market eventually although the company's execs said that, for now, there isn't sufficient customer demand.