Is my Samsung S5 Greymarket, and can I update it past 4.4.2?

Bought from eBay, sold as a UK Virgin Locked phone, but United Arab Emirates comes up under About: Device. I already have Phone INFO downloaded, and have tried updating via it's own Software Update and Smart Switch.

Knox Warranty Void: 0x0
Bootloader Version: G900FXXU1ANC9
Baseband version: G900FXXU1ANCE
PDA Version: G900FXXU1ANC9
CSC Version: G900FOJV1ANCD

HARDWARE

Hardware / Board: "qcom / MSM8974 [32-bit]"
Platform / Chip: "msm8974 / MSM8974PRO"

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