Garmons are better GPS devices than any phone. Paper maps are still the best. There are many failure points for GPS navigation, none for maps and compass. (Except old fashioned brain farts.) I’m very fond of USGS Quads. When I travel I always bring Delmore map books along, one for each state I visit. They help find more interesting places than Internet searches can turn up.
I use all three when in remote areas: paper maps, downloaded maps, dedicated GPS device.
GPS can lead to interesting situations. I-70 through Glenwood canyon (colorado)was closed for an extended period of time 2 years ago due to a wild fire and subsequent flash flooding. it’s a very narrow canyon and the only detour is about 4 1/2 hours to work around it. They finally had to put warnings everywhere not to use your gps and follow the official detours. The gps was taking people (not used to mountain driving in 2 wheel drive vehicles) on jeep roads. These “roads” are somewhat passable at certain times of the year in specially equipped jeeps or similar and are definitely not for the faint of heart. Tourists would get stuck on them and rescue/tow is extremely difficult. your GPS does not assess your vehicle and driving ability nor the condition of the road. It’s a wonder no one died…..