Of course, this also means that Nokia will stop Symbian updates no later than the end of this year. This message does sound a bit sudden, because a lot of sources said Nokia will completely give up the Symbian platform in 2014.
Prior to the exposure of the roadmap shows the after Belle, there will be Carla and Donna followed, Donna will support 720p screen and it will also be equipped with dual-core processors.
Source : http://mobile.csdn.net/a/20120524/2805904.html