The source also backed up a fair few of the specs we've already heard. Though he or she did say there's one slight change in store.
So, what do we already know? The Xperia Z is said to have a 5-inch screen packing a 1080p resolution, joining the ranks of theas well as potential handsets from Samsung and LG next year. Not that that's a bad thing: 1080p in your hand is an enticing prospect, and with screens getting bigger, it should make watching movies on your phone a real treat.
The display will use the same OptiContrast tech as found in the Xperia V and Xperia Tablet S, the source says.
According to the source, the chassis will be dust- and water-resistant, and have dimensions of 139 x 71 x 7.9mm. That's only marginally fatter than an iPhone 5.
The source said the Xperia Z will have a 12-megapixel camera on the back, which is what we've heard previously.
It does sound pretty cool, with 1080p smart phones looking to be all the rage next year. I reckon it'll make an appearance at CES in January, or Mobile World Congress at the end of February. What do you make of it? Would you want a 1080p screen on your mobile? Let me know in the comments, or on Facebook.