Palm Handhelds m500 - Manual (Page 218)

Page 208 Setting Preferences for Your Handheld
2. Tap Details.
3. Tap the Speed pick list and select the appropriate speed.
4. Enter the initialization string supplied by the documentation for
the modem attached to your mobile phone, if necessary.
5. Tap OK, and then tap OK again to save the configuration.
After you create the configuration, you need to set up the HotSync
Manager of your Desktop application and the HotSync application of
your handheld to perform a modem HotSync operation.
Tap here