Communications wise the phone includes all the main connection suspects, from HSPA through to Bluetooth, as well as a number of presence and social networking features, designed to boost the user experience. Although pitched at consumers, such tools could prove popular among work groups and mobile workers.
As well as being based on Google's Android, the device includes the new UX open-source platform developed for the Sony Ericsson X series, which lets users keep in touch with their social networking commitments, along with the Timescape and Mediascape media and internet browsing applications.
Enhancing this is an 'infinite' button that pulls together all communications from any individual, and face recognition software which can be used to upload and tag pictures of five different people to a range of sites.
Bert Nordberg, president of Sony Ericsson, said that the phones will be released next year, and will continue to be open and innovative.
"The Xperia X10 and the family of phones launching in the first half of 2010 underpin our commitment to an open and multi-platform strategy that maximises choice for the consumer and delivers the best possible consumer experience," he said.
"The reaction from our global operator partners to the X10 has been extremely positive, and we will be rolling it out across the world, including Japan, from the first half of 2010."
The handset also offers access to a range of applications through Google's Android Market, and includes a new wireless headset with an FM receiver.
The X10 supports GSM, GPRS/Edge 850/900/1800/1900, UMTS HSPA 900/1700/2100 and UMTS HSPA 800/850/1900/2100, and comes in two colours, Sensuous Black and Luster White. GPS, Wi-Fi and Bluetooth are also included, and the phone weighs just 135g.