Avoiding buying sat nav and charging the zumo xt

[TripleThreat719]

Yes... The Zumo XT will provide you with greater coverage than cellular service because it is receiving its signal via satellite, rather than cell phone towers. It even does a remarkable job in fairly dense tree coverage.

Your cell phone also uses satellite networks for it's GPS rather than cell coverage. The only difference is what jfheath mentioned above.

Yes - but the satellite signal reception on my Zumo XT is considerably stronger than my iPhone...