PlutoParty

There are giant swaths of area with no coverage, especially in the mountains of arizona, including the freeways and especially highways. The entire western US can be spotty with signal out in the great wide open. It isn't until the Midwest and more east that one should largely not worry about signal coverage anymore.

What is a non-mechanical mechanical part?

Google Maps is always dead on for me. I regularly drive very long distances across the US. The time estimates are within minutes of accurate even when there are sudden or extreme backups like in Los Angeles. There's plenty to criticize Google for, but it isn't Google maps for me.