Goldtech Electronics - The Nokia Lumia 535 uses the Windows 8.1 operating system (but you can upgrade this to Windows 10), a fast quad-core 1.2 GHz processor, comes with a 5 MP
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Update: Not GDR2] Windows Phone 8.1 Update 2 now available for the Microsoft Lumia 535 - MSPoweruser
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Microsoft Lumia 535 5 inch UK SIM-Free Smartphone - Black (Qualcomm Snapdragon 200 1.2GHz, 1Gb RAM, 8Gb storage, Wi-Fi, BT, Camera, Windows 8.1): Amazon.co.uk
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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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