According to US law, the FBI and other law enforcement agencies are supposed to use their own, or government resources wherever possible, rather than rely on those of private organisations, public corporations and private individuals, so that they don't place an undue burden on them and use taxpayers money which is already committed to such a project, frivously. I don't know about you, but I have found it rather strange that none of the US intelligence and security services, have as yet admitted or even commented on whether they have the resources, the software and other wherewithalls to do so.
The FBI is pursuing the case against Apple on the basis of using the All Writs Act of 1789, which is limited in its jurisdiction for issuing search warrants in certain circumstances. One of those limiting circumstances is that it (FBI) or other law enforcement should find out from other government agencies whether it can get the information it requires from the phone in another way, or from another agency. I wonder if the FBI will be submitting any declaration that they have in fact consulted with other specialist state agencies to see if they can derive the contents of Farooks phone, and all the other 225 Iphones by other means, which are within the parlance and ambit of those agencies...
Just a thought...a mere spes...a tiny musing