Originally Posted by
JohnJ80
Well, here's an actual example. I was on a weekend tour with my son in Door County, WI. Got off the ferry on Washington Island and had to get to the campground. Well, no cellular service of consequence, so I found it in the POI (Point of Interest) list in my bike computer and I navigated to that. It was about 4-5 miles away and not something you can just ride with your phone in your hand and get to. So two problems - (1) no cellular and (2) had to handhold thing thing.
These two problems are not unavoidable. They are mostly an example of "doing it wrong".
People using cell phones for (non-casual) should use them in a way that doesn't require a cellular network or holding them in their hands while they ride. Which isn't that hard to do.
One issue is getting a comprehensive and current POI database (OSM is weak for that).
One weakness of cycling nav units is looking at maps with their small screens and slow CPUs. Smart phones are great for that.