Why switch carriers for that, you can get the same functionality built-in to iPhones and it's not dependent on carrier.
Works surprisingly well. You have to be outside and hold iPhone in the specifics position pointed at satellite, it tells you where to turn iPhone to to get signal.
(I’m referring to the "Messages via Satellite" feature that launched two months ago in iOS 18. This is different from the "Emergency SOS via Satellite" feature that has been around since 2022.)