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A comment on Why is using SMS bad for 2FA?.
- it's best effort: message may (or may not) be delivered; they may (or may not) come in order; they may (or may not) be timely
- SIM stealing/swapping is not hard
- it's all plain-text
- if you fatfinger the phone number, your auth code goes to the wrong place
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- it's best effort: message may (or may not) be delivered; they may (or may not) come in order; they may (or may not) be timely
- SIM stealing/swapping is not hard
- it's all plain-text
- if you fatfinger the phone number, your auth code goes to the wrong place