From page 162 of the Digital Navigation User Manual, Heading: Mobile Phone Compatibility
Depending on the manufacturer, product and
product specification, some mobile phones
functions may not be supported or may not
operate to specification. Carefully read the
cautions listed below.
● The occurrence of problems upon using
mobile phones may be caused by the mobile
phone and not by the Audio/Navigation
● Even mobile phones which suppor t
Bluetooth® function may not operate properly
if the mobile phone connection has
been locked. Release the connection lock
and try connecting the mobile phone with
the system again.
● The Mobile phone battery icon and signal
strength icon may not be properly displayed
depending on the type of mobile
● Call waiting is supported only when the
connected mobile phones support this feature.
The call waiting pop-up may not be
displayed in some mobile phones.
● Audio streaming mode will operate only
when a Bluetooth® phone has been connected.
Connec t ing or di sconnec t ing a
Bluetooth® phone while audio streaming is
operating will stop music play.
● The audio streaming function may not be
supported in some mobile phones.
● The phonebook may take a prolonged
period of time to download or may not operate
in some mobile phones.
● The quality of Bluetooth® handsfree calls
may differ depending on the mobile phone
Reviewing the reset of the commands and options for the phone settings with Navigation I could not find any manual input commands. There is a page in the Optima Owner's Manual with commands for the Phone System without Navigation which includes the manual input commands. So the dealership may be right, although I'm with you that would seem supremely silly to do.
You can find these materials if you don't have them in print at www.kiatechinfo.com
Oh I found this List of Compatible Phone with the Navigation system, last update 9-20-2010: KIA Compatible Phone List 9-20-2010