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Xperia go (ST27i) is a sleek and fast smartphone with the highest rating of durability, IP67. This means Xperia go has the highest protection against dust and water available for any smartphone on the market now. Xperia go is of course fully compatible with Sony SmartWatch. Xperia go will launch in the US market under the name "Xperia advance". Develop your own smart extensions with the Smart Extension SDK.
For more information go to http://developer.sonymobile.com