The article has been updated to reflect that it's overriding an undocumented method on the UIApplication class called -proximityStateChanged. I've tried it and

The article has been updated to reflect that it's overriding an undocumented method on the UIApplication class called -proximityStateChanged. I've tried it and it looks like it's not a delegate method. Gruber has a much better article on this here: http://daringfireball.net/2008/11/google_mobile_uses_private_iphone_apis http://daringfireball.net/2008/11/google_mobile_uses_private...