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Nissan To Deactivate Key Features From Early EVs
(www.carscoops.com)
This is a most excellent place for technology news and articles.
3G still exists specifically for stuff like this (though more for remote monitoring devices, since this is a consumer device requiring a consumer account, it doesn't work).
It's just that as a consumer, you can't buy into 3G - there's no way to get service on 3G.
One car in my family is 3G only, and reports a cell connection everywhere we go (it just can't use it).
The oil/gas/pipeline (water) sector uses 3G monitoring devices all over the place.