Optus Australia is currently giving away a 1TB Xbox One with every purchase of the Lumia 950 and the Lumia 950 XL. All you need to do is buy either handset from the carrier, which is offering monthly plans starting from AUD60 ($43) for the Lumia 950 and AUD64 ($46) for the 950 XL.
Full story from the WindowsCentral blog...