A couple questions about Nuvi 40LM

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Jun 21, 2026
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Hi! I have 2 of these. 1 I use routinely in my car here in the continental US, updating the maps every couple years. The other sits in the closet 'cause it seems to have no value, last time I looked to sell it on ebay. But it works, can get the latest maps, etc. I guess everyone has an app on their phone?

My kids didn't want the 2nd one because of that - we have an app on our phones. We do have / use the apps on the phone more than this, but....

Fast forward to some of our trips to arizona and maine (and likely elsewhere) with no cell coverage. The Nuvi gets us where we have to go : )

Anyway, anyone care to field a couple questions:

1) The one in the house says it has the continental us map and doesn't have a mini sd card in it and hasn't been updated in a couple years. The one I use needed an SD card, I thought just during the update. But it wants it in all the time. And I have north america maps. Any chance I can choose just continental US and maybe free up the SD card? Going into the menus to maps, I can only unselect the entire north america map. can't get to the sub maps.

2) For a long time, when I start the car the nuvi says aquiring satellites for a couple minutes or more. And the map doesn't show that it remembered the last location (where it is now from when it was turned off). The battery on the unit does work - it will keep working if I disconnect from the car power. I had opened it up to see if there's a coin battery in there to hold last location or other things. But didn't see anything. it seems like it doesn't have a clue where it is and has to start looking for satellites from scratch. Vs. previously, it knew where it was and had an idea of where the satelites were / got to an active map much quicker.
 

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