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La Update 2 de Windows Phone 8.1 es real, y los Lumia 640 y 640 XL ya la incluyen
Lumia 640 & Lumia 640 XL receive new Firmware + OS update. Changelog. - Nokiapoweruser
Microsoft Lumia 640 XL 8GB Quad-Core Windows 8.1 Single Sim Smartphone (GSM Unlocked) - Black
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