Connectivity options for the phone include: mini-USB; wireless LAN 802.11b/g; Bluetooth 2.0 with A2DP, FTP, and HID; EDGE; and quad-band GSM, UMTS, HSDPA, HSUPA, and HSCSD.

Standard features on the X1 include push email, an RSS feed aggregator, and handwriting recognition.

[11] The home screen on the Xperia X1 supports up to nine different "panels" which can be switched between by the user, each offering different functionality.

Sony Ericsson released an SDK for developers which allows panels to be created using either C++ or HTML with Microsoft Visual Studio 2005 SP1 or better.

[13] There is also a third party website which simplifies the process of creating an HTML panel, as it is quite a complex task with Visual Studio.

The phone is available in two colors Dimensions: 110.0 × 53.0 × 16.7 millimeters; 4.33 × 2.09 × 0.66 inches Weight with battery: 158.0 grams; 5.57 ounces Lithium-Polymer, 1500 mAh.

This enables audio and video streaming, web surfing, multimedia messaging and email.

Additionally, the Rhobuntu project makes it possible to run Ubuntu Linux on some Windows Mobile phones, including the Xperia X1.