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.

https://www.aliexpress.com/wholesale?trafficChannel=main&d=y...