Anything that is not AT&T, Verizon or T-Mobile will most always rely on one of these three and their towers. Which means you will be deprioritized for their customers. There are some smaller companies that have their own towers but they are few and far between and cover a very small area. Google Fi for example, uses the T-Mobile network and a smaller network that only covers a small patch in the Midwest somewhere.

That’s every third party lease phone service and the difference between paying for a company that owns their own towers or network like Verizon, t mobile, and at&t, compared to any of the ones like mint who just use the towers that any of the above carriers own. If you use anything like Mint, you get bumped to the bottom of the bandwidth availability.

Otherwise why would anyone pay more for the same service?