The Sony Ericsson XPERIA X1 is Sony Ericsson’s first cellular phone that runs on Windows Mobile 6. 0 operating system. Comes equipped with a gigantic 3. 0-inch LCD Touchscreen, the Sony Ericsson XPERIA X1 slider phone is said to challenge Apple’s iPhone that shake the mobile industry in 2007. Thanks to the Windows Mobile operating system, the XPERIA X1 comes preloaded with Microsoft Applications including Words, Excel, PowerPoint, Outlook, Internet Explorer, and Mobile Media Player Mobile, allowing users to work and relax at anywhere. Other features of the X1 phone includes ultra-fast 3G data connectivity support (UMTS), a built-in 3. 2-megapixel digital camera, and built-in GPS navigation system.