I did wrt-applet.
it breezed a little in old Symbian (f.e. nokia 5800) due to big code volume.
It works perfect in Symbian ^3.
Now clients says that it don't work in Simbian anna in nokia C7 on some devices.
They see only white screen.
I researched : Ajax on load event function doesn't execute.
It worked perfect in C7+Symbian ^3.