My solution - crappy china phone and the cheapest pre-paid sim card I can find. I turn it on, receive my SMS, then turn it off again. Doesn't track back to me because I paid cash, doesn't report my location because china phones don't have GPS, isn't on the VOIP or multiuser blacklist because its a "real" phone number.
It won't protect you against three letter agencies - it is more my double middle finger to everyone who thinks SMS verification has value, or somehow the gateway to marketing to me, or being able to harass me if they wanted. I have the telco turn off voice mail on the number so that nobody can produce phone records showing a completed call and say I was contacted.
https://www.aliexpress.com/wholesale?trafficChannel=main&d=y...