A good mount for your smartphone (I got a nice one at proclipusa) and an app like Google Maps, Waze or TomTom (my personal preference) is much less expensive and significantly more functional, IMO.
There really are so many choices that are better now in every way. Take for example an ipad with cell capability, but no account, you can actually use the GPS chip inside it on map apps that are already downloaded. Same way an iphone works with the same mapping apps even when there is no cell service at all.
I'm using "Scenic maps" currently for hiking and back country driving. It works perfectly even without an cell service. There are certainly others that will do the same thing with more features.
There are three ways to run an ipad with full internet though:
-pay for data cell account on the ipad.
-use iphone as a wifi hotspot (will depending on your data volume plan though, mine is unlimited but I can't use it as a hotspot. Unlimited is worth more to me than occasional hotspot)
-pay for an actual wifi hotspot that you could run the ipad off, or even a laptop, etc. I use ATT for the phone because it allows phone call during data use at the same time but my wifi hotspot is Verizon because it gets the best reception in more mountainous places in WA.
An added bonus for you people who want to stay in touch, an iphone will allow emails or even imessage texts over my Version wifi even if there's no ATT cell service. Having options can be useful.
Or, just get over it and stop at a payphone after the trip to tell people you survived
