"Version of a build software in a S60 device"
http://forum.nokia.com/Technical_Library/FNTL/Version_of_a_build_software_in_a_S60_device.htm
"Finding out the software build version of a S60 device in numeric format"
http://forum.nokia.com/Technical_Library/FNTL/Finding_out_the_software_build_version_of_a_S60_device_in_numeric_format_.htm