I think my account was hacked or someone is using it without my permission.
Make sure that you've added your correct mobile number to your Facebook account. If you entered the wrong number, you can correct your information and have the text message (SMS) resent. In some countries, you may need to wait up to 12 hours before you receive the code. We're working with mobile carriers to resolve this issue. If you've followed the above steps and are still having trouble receiving the text message with your confirmation code, let us know.