The system is not advertised on the carrier portal, there’s no indication that you opted in and there’s no option to opt out.
To know about it, you need to be annoying like me and investigate. Once I learned about it through questioning the spammer, I called the carrier and requested opt out. First the call center people didn’t know what I’m talking about then at some point they used some innocent sounding name for it and promised that I’m out. I still receive spam everyday.
To know about it, you need to be annoying like me and investigate. Once I learned about it through questioning the spammer, I called the carrier and requested opt out. First the call center people didn’t know what I’m talking about then at some point they used some innocent sounding name for it and promised that I’m out. I still receive spam everyday.