That's why I left AT&T. They shut off my daughter's phone, without warning, in the middle of the night because it wasn't whitelisted. Their whitelist is utterly arbitrary, and even brand new phones are not on the list if they happen to be an international version. They explicitly state that certain models of the Samsung Galaxy S20 are not whitelisted.
As for my daughter, she was under the impression that she had until February of 2022 to replace her phone, but it was disconnected five months earlier than anticipated. I'm now with T-Mobile and satisfied. For my location it has better coverage than AT&T did, is significantly faster, and I have unlimited data.
As for my daughter, she was under the impression that she had until February of 2022 to replace her phone, but it was disconnected five months earlier than anticipated. I'm now with T-Mobile and satisfied. For my location it has better coverage than AT&T did, is significantly faster, and I have unlimited data.