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Microsoft launches Lumia 640 4G mobile at Rs 17,399 - The Economic Times
Microsoft Unveils the Lumia 640 and Lumia 640 XL
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Microsoft at MWC 2015: Lumia 640 and 640 XL Announced, 4K 120Hz Surface Hub Demoed
Microsoft Lumia 640 review - Extraordinary device for an ordinary price - MSPoweruser
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Microsoft Lumia 640 review: The Moto G of the Windows world - Tech Advisor
Microsoft Lumia 640 review: Impressive device, affordable price - Neowin
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Microsoft Lumia 640 XL Review: Big Screen Without A Big Price Tag
Microsoft Lumia 640 review: The Moto G of the Windows world - Tech Advisor
Microsoft Devices launches Lumia 640, Lumia 640 XL in India; price starts at Rs 11,999 | The Financial Express
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