Wednesday, January 17, 2024

Not receiving SMS two factor authentication codes for Facebook, Instagram, others: remove blocked numbers

A friend was not receiving Facebook SMS two factor authentication codes on his iPhone. I removed all his blocked numbers and he received the code. We assume he accidentally blocked the number Facebook uses to send SMS codes.

You can see blocked numbers in Settings:Phone:Blocked Contacts (it's actually a list of blocked numbers, not a list of blocked Contacts). If iCloud sync is working you see the same list in Messages on macOS.

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