This process depends on whether you use a physical SIM card or an eSIM. Boost Mobile sells its services through its retail locations, as well as Apple, Amazon, and other third-party providers.
If your mobile network is slowing you down, you can give a boost to your mobile data speeds and signal strength ... Open Settings -> Wi-Fi & Internet -> SIM & network. Here, check the Preferred ...
It promotes international data roaming in over 100 countries ... iPhone XR or later will also be able to use an eSIM as their main SIM. Does Boost Mobile come with Wi-Fi calling?