I want to upgrade Nougat 7.0 to 7.1 on my new BLU VIVO X

I just bought a BLU VIVO X which works great, but there are a few features that I have read about in some articles I found, that indicate that Nougat 7.1 might have some more interesting features. My questions is...how do I upgrade my VIVO X to Nougat 7.1?

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