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At the Mix10 conference, the Windows Phone 7 teams had some very big announcements – a lot of it had been kept secret and first revealed to the public now. There is however still some details they keep secret. Some of these secrets are the user agents of Internet Explorer for Windows Phone 7, which they simply wouldn’t give us.

After playing with Windows Phone 7 we managed to secure a copy of the user agent string. The user agent for IE on Windows Phone 7 running on the Asus Galaxy device is:

Mozilla/4.0 (compatible; MSIE 7.0; Windows Phone OS 7.0; Trident/3.1; IEMobile/7.0) Asus;Galaxy6


Notice that it identifies the browser as IE7 and the operating system as Windows Phone OS 7. The IE team told us that the browser in Windows Phone 7 is a mobile version of IE7 with certain features ported from IE8. So it doesn’t use the full Trident 4 layout engine that IE8 uses, but instead Trident version 3.1 with a few extra capabilities.

The user agent was retrieved from server logs, so it is the actual user agent from the actual browser.