We haven’t even seen lots of smartphones running Android 2.3 when all of a sudden Android 2.4 seems to be coming out this April. This latest Android version addresses the compatibility issues between dual core and single core Android smartphones. Apparently, applications created for dual core Android smartphones will not run in single core Androids. This was tested when applications created for Android 3.0, an OS optimized for dual core tablets, could not run on single core Android smartphones.