Rockland has 3 cellular towers and I think all carriers work except Nextel-Sprint phones (last I knew). Reception is great in Rockland.
Ontonagon also got a new tower late last year, ATT is the primary carrier for that tower. Mass City, because of the bluff, still requires you to stand on your left leg...right arm up at a 45 degree angle....and to hop in a northerly direction.....to get service.
We (thebluff) are now an authorized AT&T wireless retail stores in Mass City and Ontonagon. Just getting in some inventory this next week.