Three sells mobile phones, SIM only plans, tablets and home broadband, with a strong emphasis on generous data allowances and 5G. Shoppers can browse contract phones from Apple, Samsung and other leading brands as well as lower-commitment SIM plans.

The online store is straightforward for comparing monthly cost, upfront cost and data, which is helpful if value is the main priority. Three is also a popular option for customers who stream, tether or use large amounts of mobile data.

Three offers student deals on eligible phone, SIM and broadband plans, with discounts focused on the airtime element. It suits shoppers who want a major UK network and are looking closely at data, price and 5G availability.