RAM 2500 2019 Owner's Manual page 659

MULTIMEDIA 657
TIP:
When providing a Voice Command, push the Phone button
and say "Call," then pronounce the name exactly as it
appears in your phone book. When a contact has multiple
phone numbers, you can say "Call John Smith work."
Uconnect 4/4C/4C NAV With 8.4–inch Display
Uconnect 3 Phone
9