Boost has no native network, they’re an MNVO wholly on AT&T’s pipe. They sold all their spectrum to AT&T in 2025 after they failed miserably, and possibly on purpose, to build out the promised network capability.
I remember thinking at the time they bid and won just to hope to be bought out by T-mobile or Verizon…
Don’t let the door hit your diapered ass on the way out!