The 6.44-inch, quad-core device, confirmed earlier this week, is up for pre-order at Clove, with the store saying it expects delivery of the device in September.
If the price tag is confirmed by Sony, which has already outed an official €719 RRP (around £614) in the EU, it would make the 16GB Xperia Z Ultra the most expensive smartphone on the market.
Plenty of bang for your buck
So what will Sony fans get for their purported £600? Well the device brings a 1080p HD display, boosted by the Triluminous tech from Sony's high-end Bravia TVs.
The quad-core Snapdragon 800 processor is clocked at 2.2GHz, it runs Android 4.2.2 Jelly Bean and is both IP55 and IP58 certified, making it waterproof and dustproof to a certain extent.
We'll let you know about the pricetag as soon as we get official word from Sony, but until then, you'd better get saving.
- If the Xperia Z Ultra is too big to fit in your pocket, Sony will incumber you with a Bluetooth handset accessory too!
Sign up for Black Friday email alerts!
Get the hottest deals available in your inbox plus news, reviews, opinion, analysis and more from the TechRadar team.
A technology journalist, writer and videographer of many magazines and websites including T3, Gadget Magazine and TechRadar.com. He specializes in applications for smartphones, tablets and handheld devices, with bylines also at The Guardian, WIRED, Trusted Reviews and Wareable. Chris is also the podcast host for The Liverpool Way. As well as tech and football, Chris is a pop-punk fan and enjoys the art of wrasslin'.