We have Verizon with cell phone booster. It's very rare we have no service. For directions we use Google Maps. It's very good and upto date. Google Maps is very good about telling which lane to be in for upcoming exits. For traffic info Waze works great. It's crowd sourced. Meaning other users report accidents, debris and slowdowns. Waze navigation is not as good as Google Maps. Google did buy Waze 2 or 3 yrs ago.