A handful of screenshot of the upcoming Windows Phone 7.7 Build named Tango have recently appeared on a Russian site. As we have previously heard Tango will be mainly aimed at enabling lower-end handset to run Windows Phone 7 with lower ram requirements (even though 256MB has always been the minimum req for WP7), lower MP cameras,making some sensors optional and adding more language and region support. As you can see in the screenshot above this will obviously introduce a form of fragmentation in the ecosystem because some application will require more than 256Mb to run and thus not be compatible with some of the low end device running Tango. This is in someday reminiscent to the way the iOS platform works in terms of application compatibly across the iPhone models (but still far from the mess that is Android).
In addition to this Tango will also finally introduce video, audio sharing and multiple-attachments via MMS. Exporting contacts to the SIM card and more Data roaming option:
Still no sign of the content search feature we saw a while a go though.