Windows Phone 7.5 is now necessary to continue to use the Marketplace

Microsoft has announced that from May 22, you must have Windows Phone 5.7 Mango on their smartphones to continue to download applications and games from Marketplace.

As of yesterday, in fact, Microsoft has announced that the devices that still  does not mount Windows Phone Mango,will not be able to download, purchase or review applications and games from Windows Phone Marketplace .

In short, every aspect related to the online store of Windows Phone will be disabled. This is undoubtedly a forced action starts from Microsoft, undertaken by anyone before, but partly correct. Most of today's applications in fact have been developed to be compatible only with Windows Phone Mango, to offer a better user experience.

Source Windows Phone Blog