I see ads all the time for shit like consumer Cellular, mint mobile, stuff that rents time on Verizon towers and sells you a plan for like half the price.
I'm trying real hard to de-Xfinity myself but the cellular plan is the cheapest of all the major companies. Yes, I know they also piggyback off the Verizon network, but at least they have 24/7 support
I've had Mint Mobile for 3 years. Have had no issues, same for wife and roommate. Thought a friend that live 30 min away can't get it to work for them. Even though T-Mobile (the network Mint uses) works fine for them.