The British Olympian has joined forces with the Chinese tech giant to unveil the company's next generation smartphone with fans able to get their hands on a free device if they're willing to take the plunge.
On Saturday (10.19.19), a semi-submersible structure - complete with kiosk attendant - will house thousands of pounds worth of Huawei's latest tech at the Royal Victoria Dock in London.
Long jumper Greg was the first person to don a wetsuit and take a dive into the freezing cold water to nab a new GT 2.
Customers wanting to take on the challenge will have to drive in, swim to the 'Dive-Thru' to place their order, and then collect the device from an underwater hatch.
Greg said: "I'm used to high intensity sports and keeping fit and healthy is something I'm not averse to, however jumping in the freezing cold water of the Royal Victoria Dock isn't something I tend to do on a regular basis!
"The new Huawei Watch GT 2 is the perfect accompaniment to working out and keeping on top of exercising and staying fit, so I didn't mind getting in the water to get my hands on one! "Plus it has a dedicated Open Swim mode, so can keep track of my stroke in the water. What's more, everyone else can give it a go too, if they're one of the first people here on Saturday at midday!"
The Huawei Watch GT 2 - priced at £199 and available now in a range of colors - is completely water-proof and packed full of sports data monitoring features.