Two learnings here.
1. Avoid using SMS for two-factor authentication.
2.Don’t readily give away your phone number. It’s one of the unique trackable identifiers of you as an individual, and often not necessary for a commercial relationship.
techcrunch.com/2019/10/08/twi…
Five 2-factor authenticator (2FA) software/apps compared:
smartphones.gadgethacks.com/how-to/5-best-…
Database of services and if they support 2FA, and what type (look for "software"):
twofactorauth.org
