Originally posted over on the Windows Phone Blog.

For the past few weeks I’ve been mentioning that you’ll soon need Windows Phone 7.5 installed on your phone to buy, download, or update apps from Marketplace. (This applies to both the phone and web storefronts, by the way.)

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We’re now doing the final work needed to turn on this new requirement, so I thought it would be a good time for another friendly reminder. If you’re just tuning in, my earlier post has all the details on why we’re doing this. (In short, the new requirement is tied to a larger Marketplace improvement effort.) But the key takeaway is that if you like apps and games, you’ll soon need Windows Phone 7.5 installed to continue using Marketplace. Most of you already do.

If not, you’ll find a checklist and step-by-step instructions for installing Windows Phone 7.5 on Update Central. I’ll also be back with another reminder on the day the requirement actually kicks in.