...Ericsson P990 phone? Devices like Sony Ericsson P990 are full fledged computers, not very different (broadly) from desktop computers of mid and late 90s. Just like we can install the latest version of Windows operating system on a desktop computer, is it possible to install (even if manually) the latest Symbian operating system on Sony Ericsson P990 (which is a very advanced phone cum PDA), so that I have access to the enhancements and refinements that the latest version of Symbian has?