Wow, this really is a surprise! We’ve seen the Arc and the Play, but now Sony Ericsson has just announced the mammoth Xperia Pro Android phone — a slider device with a full QWERTY keyboard at Mobile World Congress 2011.

This Android workhorse sports a 3.7-inch, 854 x 480 display panel which uses the same Bravia graphics engine technology like the rest. Well, this phone is sadly very ‘yesteryear’, as it only runs atop a 1GHz Snapdragon CPU, so no dual-core fancy SoC here, though it’s sporting SE’s customized build of Gingerbread (Android 2.3). The phone has an 8 megapixel camera with LED flash, 2 megapixel front facing camera, and will be available in silver, red, and black.

Specs:

• Size: 120 x 57 x 13.5 mm
• Weight: 140 grams
• Phone memory: Up to 320MB
• Memory card support: microSD™, up to 32GB
• Memory card included: 8GB microSD™
• Operating system: Google™ Android 2.3 (Gingerbread)
• Processor: 1 GHz Qualcomm Snapdragon™ MSM8255
• Talk time GSM/GPRS: Up to 6 hrs 55 min*
• Standby time GSM/GPRS: Up to 430 hrs*
• Talk time UMTS: Up to 7 hrs*
• Standby time UMTS: Up to 400 hrs*
• Music listening time: Up to 31 hrs*
• Video playback time: Up to 7 hrs 25 min*

Networks

• UMTS HSPA 900, 2100 GSM GPRS/EDGE 850, 900, 1800, 1900
• UMTS HSPA 800, 1900, 2100 GSM GPRS/EDGE 850, 900, 1800, 1900

*According to GSM Association Battery Life Measurement Technique. Battery performance may vary depending on network conditions and configurations, and phone usage.