I've ordered some third party charging devices for my iphone. In the past I've gotten a message to the effect "this cable is not certified by Apple", however in the past it still worked/charged. This morning I plugged in my phone into the same charger, got the message, but this time it did not charge. Yes it could be a cheap 3rd party device that broke, but it made me wonder if Apple has the ability to put in blocks that would keep a 3rd party device like this from working? I assume that being certified, means money was paid to Apple, and that if the Apple device can distinguish between something certified or not, they could place a block if they wanted to. Thoughts? Thanks!