For those using these maps to determine the service you can expect from an MVNO operating on these providers, beware.
I've been using Google Fi and tried a few others with Visible being the one that I found to be the most difficult to sort out. Visible uses Verizon's network (IIRC, they're owned by Verizon). In the thumb of Michigan, there's a large spot at the tip that Verizon post-paid customers have service (via the Extended Network[0]) but Visible does not. In fact, Lexington and Port Huron, with about a 5 mile buffer, were the only places service functioned similarly to home (albeit LTE rather than 5G) where coverage is solid. And it's not a matter of "there was really poor/slow/spotty service", there was simply nothing from just north of Lexington up M-25 to Port Austin and for much of M-59 from Armada to Port Austin[1].
Over the summer that I had this service, my mental model of the map would have the entire thumb empty with a few bursts of service over a some of the more populated areas, much like T-Mobile indicates. And that's curious -- the T-Mobile map looks a whole lot more like I'd expect for most of the service. Even the post-paid Verizon/AT&T service isn't great in a lot of places -- effectively or actually no service, but according to AT&T and Verizon's maps, I should be working almost everywhere.
[0] Which, if I understand things correctly, is Verizon buying service from someone else.
[1] We hit the dark sky park in Port Austin using Waze which caused me to pay closer attention, one route up, one route back; on M-25, I'd pick up service briefly enough to get a routing update but it sat "looking for service" with the circle/slash (No) symbol matching it. On M-59, it was dead except for Sandusky.
I've been using Google Fi and tried a few others with Visible being the one that I found to be the most difficult to sort out. Visible uses Verizon's network (IIRC, they're owned by Verizon). In the thumb of Michigan, there's a large spot at the tip that Verizon post-paid customers have service (via the Extended Network[0]) but Visible does not. In fact, Lexington and Port Huron, with about a 5 mile buffer, were the only places service functioned similarly to home (albeit LTE rather than 5G) where coverage is solid. And it's not a matter of "there was really poor/slow/spotty service", there was simply nothing from just north of Lexington up M-25 to Port Austin and for much of M-59 from Armada to Port Austin[1].
Over the summer that I had this service, my mental model of the map would have the entire thumb empty with a few bursts of service over a some of the more populated areas, much like T-Mobile indicates. And that's curious -- the T-Mobile map looks a whole lot more like I'd expect for most of the service. Even the post-paid Verizon/AT&T service isn't great in a lot of places -- effectively or actually no service, but according to AT&T and Verizon's maps, I should be working almost everywhere.
[0] Which, if I understand things correctly, is Verizon buying service from someone else.
[1] We hit the dark sky park in Port Austin using Waze which caused me to pay closer attention, one route up, one route back; on M-25, I'd pick up service briefly enough to get a routing update but it sat "looking for service" with the circle/slash (No) symbol matching it. On M-59, it was dead except for Sandusky.