Even if you do get the regular blackberry browser, which I am not sure you can, you still want to keep the T-Zones. That is the set default browser for the blackberry you have. It's the only one that allows email set up, certain application downloads etc. Do not get rid of the T-Zones.
RETIRED: 7230, 7290, 8700G, 8320, 8900. 9000 BOLD