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Microsoft's LTE-capable Lumia 640 and 640 XL handsets will go on sale this Saturday - HardwareZone.com.sg
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Microsoft Lumia 640 XL LTE Review: Shines Bright With a Crisp Display, Camera's a Mixed Experience (Video) | GSMDome.com
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Hands-On With The New Microsoft Lumia 640 And 640 XL Phones | TechCrunch
Microsoft Lumia 640 LTE review | TechRadar
Review: Microsoft Lumia 640 XL | WIRED
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