How does the streaming of maps between the smartphone and Nyon work?
If a Bluetooth connection is enabled between the smartphone and your on-board computer, Nyon will use maps from the Internet for navigation. However maps are not saved on either Nyon or the smartphone.
Nyon simply keeps currently required maps in its cache for navigation purposes and automatically loads the areas needed for navigation as necessary.
Please note: if Nyon accesses the Internet through your smartphone, roaming charges may be incurred when abroad.