[adam917]

On some phones (usually unbranded high-end ones) like the N95, you can choose 3G-only mode so it can't fall back to 2G when signal is low. This can greatly help in fringe areas because otherwise, in dual-mode 3/2G, usually the phone can switch down to 2G well before you are out of range. My BlackBerry 9700 can be switched like this via the engineering menu & I no longer have these premature fallbacks. I heard the 9000 can do the same too.