Check the warranty status of your phone.
Go to a Nokia Care Point for face-to-face support
Enter *#0000# on your phone’s keypad. The display shows your phone’s model and product code.
On older phones, these numbers are printed on a white label in the battery compartment, underneath the battery.
Select Options > Settings > Search engine.
This answer applies to Nokia Browser 2.0. If you don't yet have version 2.0 in your phone, download it from Nokia Store.