Chances of upgrading W810 to C510 firmware are I believe slim and none. After all the W810i is very old at this point though of course still a remarkable piece of equipment. A number of hacks have been done including a set chronicled in these forums... http://www.howardforums.com/showthre...out-debranding
That thread is big enough to keep you busy for a while. From it you might glean clues about where real S/E fanatics hang out and keep various patches. Possibly you might find one for the conversations but don't expect anything like ability to run more than java applet at a time.