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Amazon.com: Microsoft Lumia 640 XL 8GB Quad-Core Windows 8.1 Single Sim Smartphone (GSM Unlocked) - Black
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Microsoft Lumia 640 | RM-1074 | 8GB | 4G LTE | 5" | Black | AT&T Unlocked | Used 6438158723610 | eBay
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Amazon.com: Microsoft Lumia 640 XL 8GB Quad-Core Windows 8.1 Single Sim Smartphone (GSM Unlocked) - Black
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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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Microsoft Lumia 640 XL 8GB Quad-Core Windows 8.1 Single Sim Smartphone (GSM Unlocked) - Black - Amazon.com
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Microsoft now enabling native Wi-Fi calling, HD Voice on the Lumia 640 and Lumia 640 XL | Windows Central
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