It's in his Mobile Privacy ebook
Discussion
Thanks, yeah I found it last night, great recommendation!
TLDR for those that may be seeking a similar solution, he recommends either using mysudo or using an app called Sipnetic paired with a twilio voip account.
I’m going to test these out as I’m not sure how they’ll perform behind a vpn.
In terms of handling sms 2fa (when you have no choice, like some banks), he gave an example of a client of his putting a second SIM/esim on the phone that is $5/month for call/text and leaving it disabled whenever you aren’t expecting a 2fa code.