Thanks to all for the input.
I am currently not a smartphone guy (my current cellphone bill is around $107 annually). But this is one more 'little thing' to add to the small list of reasons to change.
In the meantime it would appear that a (for example) Garmin 800 Edge with my TomTom as a backup (at least early on) should work fine.
Thanks to all for the input.
dave