So you’ve set up 2-factor authentication at all of the places we’ve recommended, and now you can’t figure out how to get Facebook to send you the authorization security code text message to your cell phone so that you can log into your Facebook account. Here’s where you need to find it.
You log into Facebook, and it presents you with this message:
“It looks like you haven’t logged in from this browser before. Please enter the security code from your Code Generator below.”
This clearly suggests that the security code has already been sent to your phone. But it hasn’t.
You see, this Facebook message is referring to a separate Code Generator utility, that is included as part of the Facebook mobile app. To find that code generator, first of all tap on the “More” symbol at the bottom of your Facebook mobile app:
..and click on Code Generator:
When you click on the Code Generator, it will generate a code for you to enter in Facebook, to grant you access.
But you want to know how to get the Facebook security code texted to your phone as an SMS message.
The secret is here:
Clicking on that “Having trouble?” (even though you aren’t) reveals this:
Click on “Send me a text message with my security code”, and Facebook will send the security code to your phone: