Uconnect 8.4A Owner's Manual Supplement page 149

148 ALL ABOUT Uconnect® ACCESS
Each time you want to use a Via Mobile app in your
vehicle, the Uconnect® Access App must be running on
your smartphone and the smartphone must be paired via
Bluetooth®.
A message will be displayed to remind you that Via
Mobile apps utilize the data plan on your connected
smartphone to provide content. Touch "OK" to continue
or the "X" to exit.
NOTE: Many smartphones have a limit to how much
data they can utilize before incurring additional charges.
The amount of data being used varies by smartphone
device, cellular service provider and the specific app.
Check your smartphone service plan for more details.