Driving up from the SF Bay to Tahoe, you'll lose cell service as you pass through the mountains - especially if you take the Highway 50 route. Drive up to Oregon, and you'll lose cell service for a long stretch roughly near Klamath Falls. (As an aside, that part of the country doesn't even have NEXRAD weather radar.)
And this is all while on the freeway or major highways. There's plenty of places out west without a reliable cell signal, or sometimes a signal that's so weak that it's not usable for data.
Driving up from the SF Bay to Tahoe, you'll lose cell service as you pass through the mountains - especially if you take the Highway 50 route. Drive up to Oregon, and you'll lose cell service for a long stretch roughly near Klamath Falls. (As an aside, that part of the country doesn't even have NEXRAD weather radar.)
And this is all while on the freeway or major highways. There's plenty of places out west without a reliable cell signal, or sometimes a signal that's so weak that it's not usable for data.