Grew up in the UP. Of course it depends on location, but DSL has been available for about 10 years. It helps to be close to a trunk. The phone company said they will be running fiber to all their existing customers in the next two years. I think there might be subsidies because it is so remote.
Yes, I occasionally spend time at our cabin north of Iron River. Cell coverage is not great except near the "bigger" towns like Houghton (Michigan Tech) and Marquette (Northern Michigan). But I love the UP and its remote northwoods wilderness.
Cable is probably confined to the biggest towns.