Converting an application from Symbian to Windows Mobile

Daniel caught me the other day. He’s a mobile developer working on some nifty communications services aimed at Ethiopians throughout the world.

He’s got some chaps to create a Symbian S40/S60 version of the service he’s aiming to launch — and is wondering how difficult it will be to convert the application to work on other platforms (e.g. Sony Ericsson).

What’s your view?