Whilst I'm not a conspiracy theorist cunt, something in the back of my mind tells me this is just a facade.
I'm pretty sure that if the FBI wanted into a phone, it wouldn't be too difficult, and if it was made public that Apple had hacked one of their own phones, then people would think they're scaredy cunts and this may affect sales.
Apple has received plenty of media attention from this, not that it was needed, and now terrorist cunts feel they can freely use iPhones without risk of their communications being monitored, ergo, the FBI can see what these naughty fuckers are up to more easily, so everyone's a winner.
I recently got a new iPhone, the first time I switched it on and entered my Apple ID, it had already copied every bit of data, phone setting and internet history from my previous handse. It spun me the fuck out, so I'm sure all this is just a ploy and whoever needs/wants the info on that phone, had it.