The X1 will be sold unlocked at authorized Sony Electronics retailers for an eye-opening $800. Meanwhile, you'll be able to pre-order one at SonyStyle.com starting tomorrow.

According to FCC documentation, the X1 that'll ship in the U.S. will only sport a 3G band suitable for AT&T's high-speed cellular-wireless data network. T-Mobile users, should there ever be any, will have to make do with the far slower EDGE technology.

Sony Ericsson's released a software development kit (SDK) to allow developers to try their hand at building X1 Panels and applications in September. That way developers can make good use of the proprietary panel interface Sony Ericsson designed for the X1 that runs on top of Windows Mobile 6.1.

In addition to Windows Mobile 6.1, the X1 sports a unique arc slider design. So when you slide up the smartphone's high-resolution 3-inch, WVGA (840 x 480-pixel) touch screen, a wide QWERTY thumb-keyboard is revealed.

As a quad-band GSM phone, you'll be able to use the smartphone to make voice calls in most world markets.

There's also Wi-Fi, Bluetooth, A-GPS for location-based services, FM receiver and 3.2 megapixel camera for picture and video.

A microSD slot is available to compliment the X1's 400MB of internal memory with gigabytes of additional storage.

The smartphone measures 4.3 x 2.1 x 0.66 inches (110 x 53 x 16.7 millimeters) and weighs in at 5.1 ounces (145 grams).

See next page for a comprehensive list of the X1's specifications.

Sony Ericsson Xperia X1's Features & Specifications

Camera	Auto focus 3.2 megapixel camera Photo light Video recording
Music	Bluetooth™ stereo (A2DP) Media player Music tones Windows Media Player™ Mobile 3D games FM radio Java Video streaming Video viewing
Internet	Internet Explorer® Mobile RSS feeds
Communication and Messaging	Polyphonic ringtones Speakerphone Vibrating alert Video calling Email Picture messaging (MMS) Predictive text input Text messaging (SMS)
Design	XPERIA™ panels Optical Joystick navigation Navigation key Picture wallpaper Touch navigation
Organizer	Alarm clock Calculator Calendar Document editors Document readers Flight mode Handwriting recognition Notes Phone book Tasks Touchscreen
Connectivity	aGPS Bluetooth™ technology Modem Synchronization USB support WLAN
Windows® Mobile® Operating System	Microsoft® Outlook Mobile: email, contacts, calendar, tasks Microsoft® Office Mobile: Word, Excel, PowerPoint Internet Explorer® Mobile Windows Media Player™ Mobile Windows Live™ Exchange ActiveSync® Voice control Utility Applications: file explorer, calculator, pictures & video, notes
Facts and Figures	Size: 110 x 53 x 16.7 mm Weight: 145 grams Available colors Solid Black Steel Silver Main screen: 65,536 color TFT Resolution: 800 X 480 pixels Size: 3 inches Memory Phone memory: up to 400 MB microSD™ memory card support
Availability and Versions	Networks GSM / GPRS / EDGE 850/900/1800/1900 UTMS / HSDPA / HSUPA 900/1900/2100 MHz UTMS / HSDPA / HSUPA 850/1900/2100 MHz Available in selected markets in the second half of 2008