Earlier quoted context omitted.
Why not get a second sim? Most phones can have 2 sims active, and a phone / text only plan is dirt cheap (3-6$/m). Offer the second number with much greater discretion.
I do basically this with a subscription to MySudo. I always get funny looks when giving out a number, living in a small town people are surprised when it isn't one of the two or three area codes around here. It works like a charm though. I have three tiers of numbers - one that I'll keep and goes to only friends and family, one that I will likely keep for a couple years until it starts getting too much spam, and a th…
I was still living in Vancouver, Canada when I learned maybe six or so years ago AT&T has removed all roaming restrictions in North America. So a few of us banded together, one of us crossed over to New York picked up a group subscription of sorts and we had very cheap subscriptions. Only the last 1-2 years did Canadian providers caught up, somewhat.
But the real advantage was if anyone called from a "local" number, local to my SIM at least, I immediately knew it was spam. I do not know anyone in Buffalo, I do not do business in Buffalo, there's no authority which has anything to do with me there, nothing. It's spam.