This patent should have been E-Digitals...

http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&u=%2Fnetahtml%2FPTO%2Fsearch-adv.htm&r=36&p=1&f=G&l=50&d=PTXT&S1=%2820120828.PD.+AND+Apple.ASNM.%29&OS=ISD/20120828+AND+AN/Apple&RS=%28ISD/20120828+AND+AN/Apple%29

It prevents people from using the phone within a certain "fenced" area, like a theatre. Very clever idea. Wish E-Digital had thought of it first. Oh well.