5th Edition and 3rd Edition FP2 phones have a Destination functionality (a group of prioritizable access points) where user can prioritize different access points(i.e. connection profiles) on within a certain "Destination" (e.g. Internet). Typically Internet Destination would have user's WLAN access points defined as a higher priority and cellular packet data access point (3G/GPRS) as a lowest priority connection method.
To prioritize access points (on a 5800XM) go to Menu -> Settings -> Connectivity -> Destinations -> Internet -> highlight the access point you want to priorítize and select Options -> Organize -> Change priority -> click on the approriate point of the access point list to move the selected access point to this priority.
Another thing to check is the "Default Connection" setting of the phone. Go to Menu -> Settings -> Connectivity -> Destinations -> and select Options -> Default Connection. Here you can define what is the default connection. You may be able to choose between Always Ask, Ask Once or you can select a certain specific Destination (typically Internet) containing all your predefined access points (both WLAN and cellular packet data) in priority order. Note that some phones (N97 ?) might not provide an "Always Ask" Default Connection option.
It should also be noted that some applications have their own settings and preferences for connectivity (either by selecting a Destination or specific access point) yet other applications may work by the "Default Connection" mechanism of the phone settings.
Built in Web browser on the phone has also related setting:
Go to Web browser -> Options -> General -> Access Point and choose either Always Ask or select an Destination (typically internet). If you set browser to "Always Ask" it should show you a list of currently available connection methods (shows the highest priority available AP of the Destination) and prompt user to select connection every time you start up the connection from within browser by selecting a bookmark or entering an URL.
Note that in case there are multiple access point available within a single Destination at the time phone prompts user to "Select connection" and the one offered by default is not what user wants to choose then there is also a chance to select "Options" -> "Select access point" that shows a list of all currently available access points for user to choose from.
For most Java based applications (gmail client, opera mini etc.) there is usually an option to choose an default access point within Application Manager. Go to Application Manager -> Installed Applications -> highlight the given installed Java application -> select Options -> Settings -> Access Point. Here you can either define a fixed access point that this particular Java application uses or the default access point selection can be set to "None" which typically triggers Java applications to prompt which access point it should use each time it looks for a connection.
Note that selecting a specific access point for a certain Java application might cause connection problems for the application if the selected access point is not available at the time Java application tries to connect (WLAN access points are not likely to be always available thus choosing one as a default AP for Java application may cause it to fail connecting outside of given WLAN networks coverage.
Support
