Browser not recognized. Don’t receive any code on phone

None of the selected topics seem right.

My facebook was compromised. I had to use the trusted friends option to recover it. I was able to change my password and email so I now have access.

When I log in, I get a ‘browser not recognized’ message and it tells

me a code is being sent to my phone. It says it will take a few minutes, but I never receive it.

Suggestions?