When Facebook won’t send security codes, you’re stuck on the login screen without access to your account. Here are some solutions we’ve verified that can help you get those security codes.
How to Fix Facebook Not Sending SMS Code Issue
Often, Facebook has sent the code. If you haven't had to use two-factor authentication in a while, it can be difficult to know where to find the security code.
However, there may be a real problem, including the following:
Given the variety of possible causes, there are also several possible solutions. Go through these solutions in the order we have listed them here: