The Nokia Asha 503 is the latest handset in a series of low-cost, feature-packed devices from the Microsoft-owned company.The Asha 503 is a slightly upgraded version of the Asha 501, with an improved camera and better social integration as default. Picking up the Nokia Asha 503 SIM-free will set you back about £100. However if you sign up to a pay-as-you-go deal, you should be able to get the 503 for under £80 - an absolute bargain. The 503 comes equipped with a single rear facing 5MP camera accompanied by an LED flash, which is comparable to the Nokia Lumia 520 and the Motorola Moto G in terms of megapixels.