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Windows 10へアップグレード可能なWindows Phone 8.1スマホ「Lumia 640 XL LTE Dual SIM」が Microsoftから！ - アキバ総研
Amazon.com: Microsoft Nokia Lumia 640 LTE RM-1072 8GB 5" Unlocked GSM Windows 8MP Camera Smartphone - Black - International Version No Warranty : Cell Phones & Accessories
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