With the current implementation if the RenderMode is set to Auto in the web.config file it is later automatically changed to Leightweight instead of Mobile.
The range of BlackBerry devices recognized by RadDeviceDetectionFramework has been updated with the Telerik UI for ASP.NET AJAX Q3 2014 release.
The behavior and user-agent of the internal Blackberry Browser of new Device Models(like Z10) looks not very different to other popular devices/mobile browsers. Therefore this feature should not result in a high realization effort. If manually switched to Mobile it seems that nearly everything is working and looks similar to other mobile devices.