THIS IS FOR SURE A SCAM!
I called Apple direct (the REAL Apple customer service). THIS IS A SCAM, THIS IS NOT APPLE CALLING. Apple explained they don't have the capability to know if any Apple devices are having problems, be it software, hacking, etc. He explained further, when someone with an Apple device is having troubles, the owner of said device will contact Apple, not the other way around.
DONT ANSWER THIS CALL, doing so just opens up the door to more calls from these scum people or they sell your number and expect double + scamers to call you.
Got this at 6:30am Sunday morning: "We request you not use your Apple device before speaking to our Apple certified technicians for help and support. Press one or if you wish to hang up press two." If they had said Samsung device, it would have been more believable. :P
I recieved the same message today from this number, what a scam. Tried calling it back but it did absolutely nothing, didn't even ring ! I have a Samsung phone anyway ...