Top mobile phone maker Nokia moved Monday to take control of the world's leading cell phone software group, Symbian, drawing a line in the sand between the Finnish firm and rival Microsoft.

Nokia said it would buy around one-third in Symbian from Psion, with the British software firm getting an estimated 135.7 million ($250.7 million) in a deal that values all of Symbian at 436.2 million.

Read more: [URL=]CNN[/URL].