Checkout S60. Btw, does the Nokia 6630 use Netfront for its default web browser (built in)?
yes i know about netfront and the interal browser. but i am just interested in this new one and i just want to know, how difficult a port to an older operating system would be.
there seems to be no possibilty like a simple recompileing for the old OS
You will not see a Symbian 8 or earlier version of it, unless someone recreates the rest around the OSS bits, or Nokia decides to do a release for older versions.