Maybe worth noting that spam calls/SMS are primarily a problem in the US.
In the European countries that I've had phone numbers in, these basically don't exist, and my phone number has been part of several data breaches. (That said, I am curious if this is a problem occurring in almost all or almost no other countries!)
As far as I understand, these problems are also in the process of being fixed in the US via caller ID authentication (to enable carrier-level filtering), which seems like the right approach: In the long term, it's more or less futile to keep a phone number out of data breaches or advertiser databases.
In the European countries that I've had phone numbers in, these basically don't exist, and my phone number has been part of several data breaches. (That said, I am curious if this is a problem occurring in almost all or almost no other countries!)
As far as I understand, these problems are also in the process of being fixed in the US via caller ID authentication (to enable carrier-level filtering), which seems like the right approach: In the long term, it's more or less futile to keep a phone number out of data breaches or advertiser databases.