Microsoft's most affordable Windows 10 Mobile phone, the Lumia 550, is now available for just £39.99 at the Carphone Warehouse. The PAYG deal requires you to add a £10 top-up, which brings the total up to £49.99, but that's still an absolute bargain (£69.99 if you go SIM-free).

Since this listing is with the Carphone Warehouse (spotted by Neowin), the Lumia 550 is sold unlocked, meaning you can hop between networks to get the best deal. While it's a low-end Windows 10 Mobile phone, don't let the price fool you as the Lumia 550 is a capable device that will pull through the day.

Check out our Lumia 550 review

See at Carphone Warehouse