I didn't have the Nav option in my 2016 Ram, but was still able to subscribe to Uconnect which allowed remote start and lock from from anywhere in the world via my phone app.. This was especially useful when I wanted to warm up the truck before leaving work. I ordered my new Ram without Nav again, but just discovered it does not accommodate the phone app remote start feature. I would have had to upgrade to the 8.4 Nav radio in order to have this convenience. Just a heads-up to anyone planning on ordering a 5th Gen. and wanting the phone app. remote start feature.