Just get an app for your phone. I do have a Garmin Inreach because its got text anywhere and the SOS button to bring on Search and Rescue in an emergency. It is a good gps but I don't use it I keep it off and only use for texts to check in. I use my phone with IHunter and it works perfectly without cell service which there just about never is any where I hunt. Way way better image and all the features and tracking that a gps with a chitty screen has.
How does that work without cell service?
