Anyone have a hook up or now how do update these??? I dug up my old nuvi for road trip we are taking next month and it's outdated as fuck. It's a 255w.
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I usually do but wanted a back up in case we lose cell serviceAgree. Why not just use a phone?
Apparently you can download the maps and use Google Maps on your phone offline, where it will work with the GPS signal on your phone even if you don't have cell service. 2015 Article: https://www.outsideonline.com/2038406/how-well-do-google-maps-work-offline-absolutely-flawlessly
Here is a more recent article about it: https://www.airfarewatchdog.com/blog/40171659/no-signal-ways-to-use-your-phone-gps-without-data/