Windows Phone 8.1, the latest version of Microsoft’s mobile operating system has finally reached a 50% market share among the handsets using the company’s platform, TechCrunch reports. According to the report, the previous version of the mobile OS is still running on 33.5% of the Microsoft-powered phones of the world, while Windows Phone 7 still runs on 15.7% of Windows Phone handsets out there. The proportion of phones using the previous version of the WP OS will slowly decline in the near future, as carriers gradually roll out the update to the latest version.