how do I stop a thief from using my stolen phone
My daughter's phone was stolen at school. How can I keep thieves from ever using it again.
iPhone 5c
Did you have a passcode on the phone? That will prevent them from using the phone. Did you have Find My iPhone enabled? If so, they will not be able to restore it.
See this article for more information:
If your iPhone, iPad, or iPod touch is lost or stolen - Apple Support