Are there any links on the web for optimizing the software for unlocked Sony
Ericsson phones (T200) to work on different networks eg. phone originally
made for Fido Microcell and now is on Rogers AT&T network? SE tech said
that unlocking the phone and using the different carrier may effect
performance as the software on the phone is configured for that [original]
network.

Or can someone please post the menu commands here?

Thanks and much appreciated.