Tech question: Stock radio (Axxera AVM70) with using either the HDMI or DMH25 Dongle dual mirroring my iPhone I'm burning through data. Using Google.maps alone on a multiple day cross country trek with daily side trips over a two week period this configuration will surely drain our family data plan... Am I correct?
Also, so no GPS when outside cell tower range?
Roaming rates?
Should I consider an alternative RV radio with video camera and GPS?
Thank you for your help.
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