[stomachmonkey]

Sounds to me like the issue goes deeper than "taking away her iphone" will solve.

Dyslexia, hearing issues, other learning disabilities that may not be outwardly obvious commonly result in this type of persistent behaviour.

Many here who are offering strong arm advice would also advocate that college is not for everyone and what's wrong with a trade?

Why can't the same philosophy apply to High School?

Have you tried giving her the option of blowing off school?

As in OK, you don't have to go but what is it that you want to do instead? And "nothing" is not an answer, though it may be a clue.

Leave it up to her, she goes to school or she gets a job, learns a trade.

I do believe, if you haven't already, a complete medical work up is in order here.

This could be a chemical or hormonal imbalance.

I feel like there is a lot more going on than maybe she is even aware of. She feels a certain way and may not know why.