Quick heads-up!! Lumia 720 and Lumia 520 are now available at major operator O2 in UK. As you can see in the above screenshot, you can book Lumia 720 in Red, which was supposed to be exclusive color to O2 (though the page doesn’t mention that). Lumia 520 is also available in Red only and Red Lumia 520 seems to be exclusive color to O2 in UK as per the listing. Pay As You Go price for Lumia 720 is £299.99 and £119.99 for Lumia 520. On monthly plans both are available from Free.