The Sony Ericsson Xperia X10 is a gsm quadband 3g triband unlocked touchscreen smartphone with a scratch resistant surface an accelerometer sensor for auto rotation a proximity sensor for auto turn off a timescape and mediascape user interface.
Sony Xperia X10 has a speakerphone, Mp3, Mp4 and youtube for music and video play. It has a 1GB of internal storage and a microsd memory card slot that let you expand memory up to 32GB. for web surfing, texting, e-mailing, picture and instant messaging you can use gprs, edge 3g (where available) and wifi. it also have usb and bluetooth v2 for data transfer. There is a built in 8 Mp Camera with autofocus LED Flash, touch focus, image stabilization, geo tagging, face and smile detection and the ability to record video. which means a better camera features that some regular camera's have.
This sony Xperia X10 runs on Google's Android OS some of the other main features on this phone are. A-GPS support, Google everything like Search, Maps, Gmail, Talk plus Facebook and twitter are integrated. also has a document viewer.
The standard batter on the Sony Ericsson Xperia X10 lets you talk up to 10 hours on 2G and about 8 hours on 3G.