Introduction

Sony Ericsson currently concentrates on the categories of: music, camera, business (web and email), design, all-rounder, and budget focused phones. Its five largest categories are:

• The Walkman-branded W series music phones, launched in 2005.
  The Sony Ericsson W-series music phones are notable for being the first music-centric series mobile phones, prompting a whole new market for portable music that was developing at the time. The main feature that can be seen in all of these walkman phones is they all have a silver 'W' button which once pressed opens the media center.
  

• The Cyber-Shot -branded line of phones, launched in 2006 in newer models of the K series phones.This range of phones are focused on the quality of the camera included with the phone. Cyber-shot phones always include a flash, some with a xenon flash, and also include auto-focus cameras.
  

• The BRAVIA-branded line of phones, launched in 2007 Japan market only.
  Now, two mobile phones (FOMA SO903iTV and FOMA SO906i) uses BRAVIA brand. BRAVIA branded phone are able to watch 1seg terrestrial television.

• The UIQ smartphone range of mobiles, introduced with the P series in 2003 with the introduction of P800.They are notable for their touchscreens, QWERTY keypads (on most models), and use of the UIQ interface Platform from Symbian OS. This has since expanded into the M series and G series phones.

• The XPERIA range of mobile phones, heralded by the Sony Ericsson XPERIA X1 on February 2008 at the Mobile World Congress (formerly 3GSM) held in Barcelona Spain , had opened the door for integration of Windows Mobile Operating System into Sony Ericsson powerhouse smartphones.