There's no easy way to change a contact from Phone to Google. But there is a way to export the contacts and then import them as Google. Open the phonebook, select Menu, select Import/Export, select Export to SD Card, select Phone. All of your "Phone" contacts will be copied to your SD card. Now to import the contacts select Menu, select Import/Export, select Import from SD Card, then select Google. All of your contacts will be imported under Google. Last step is to delete the "Phone" contacts so you don't have duplicates under both "Phone" and "Google". Select Menu, select View, uncheck Google and select Done, select Menu, select Delete, select all of the Phone contacts and select Delete.