Been putting a lot of work into degoogling my life, and I'm looking to move to GrapheneOS at some point in future. Still a total noob when it comes to tech, but more to the point...

I've been a Google Fi subscriber for a few years at this point, and was always a fan of how strong the cell service is. Now that I'm trying to drop google wherever possible, I feel kinda lost when it comes to what cell provider to switch over to. I feel like most everyone I've spoken to has a laundry list of complaints about their providers having terrible cell coverage or overpriced data rates. What do you people use for cell service? What's the best option if I'm looking for security and privacy as well as a decently strong cell coverage?