The only stretch without service that readily comes to mind is on I-70 in Utah between Salina and Green River - 108 miles without ANY services or cell coverage. The first few miles out of each town has cell service, and there's about a 3 mile stretch right in the middle with weak cell service. No gas or rest areas with bathrooms.Quote:
There will be sections of highway where you won't have a signal. Exactly where, and for how long will depend on your phone and your provider.
If you take I-40, etc. you should have near-continuous coverage all the way.