Setting up family cell phones for emergency contact
* Make sure your child's cell phone has the parents' numbers programmed in it, and label them Mom and Dad.
* Make sure your cell phone message lets people know who to contact in an emergency if you don't pick up. For example, my message says: "If this is a call about Alex or Zoe, please call Jake at XXX-YYY-ZZZZ."
This blog post provides the (scary, but now resolved) backstory.