Microsoft Lumia 550

The Lumia 550 is Microsoft’s most affordable 4G LTE smartphone. Although it has a smaller screen at 4.7 inch HD display, you can still enjoy the full Windows 10 experience that includes Cortana, Windows Store and tailored Microsoft Office apps to fit the screen size to still provide convenient viewing and editing abilities. Processing power is provided by the Qualcomm Snapdragon 210 processor featuring a quad-core CPU running up to 1.1 GHz. It has 8 GB of storage space and can be expanded up to 200 GB expandable storage via the microSD slot.

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Further Reading:
Microsoft Surface Book
Microsoft Surface Pro 4
Microsoft Band 2
Microsoft Lumia 950 & 950 XL