iPhones, Armed Robbery, and Hacking (2018)
manybutfinite.com
manybutfinite.com
Also, the author says using Authy is a good alternative as it provides encrypted backup, but account authentication is via OTP to the registered phone number, so it brings back to the same problem. Is there other alternatives to this?
SMS 2FA is always weaker than TOTP, as are touchID and faceID. But you pay for convenience. And sometimes users aren’t given the option for TOTP, which is ridiculous in this day and age.
If what 2fa is protecting is more important than your phone, I think a SIM PIN is a good idea.