How to enable Two-factor authentication for facebook account?

Go back to the old device you normally use to log in and everything will be back to normal, or you can allow account login on the new device and then enable 2-factor authentication on the new device.
 
This usually happens when FB’s system is limiting actions, often due to too many recent changes or flagged activity.
Try waiting 24–48h, clear cookies, or use another device/IP. Paid fix won’t help if it’s system-side :weep:
 
Errors when enabling two-factor authentication are usually due to Facebook's security concerns, and you need to verify your identity through official support, which cannot be resolved by paying a fee.
 
Go back to the old device you normally use to log in and everything should be back to normal, then enable 2FA on the new device.
 
This is because you just logged in on a new device, please stay logged in for the next few days then try again.
 
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