What should be my daughters consequence?

I had been away for a couple days for a for a business trip and I had specifically told her not to bring her Iphone X to school ( i usually tell her to bring her old iphone 6+ to school in case of emergencies ) . Then she brings her new phone to school without me or her dads permission, And cracks it badly. How shall i punish her?

Added (1). She's 12 in the 7th grade, I promised it to her for having good grades.

Whip her ***

No new phone, chores to pay it off