Giffgaff is a mobile phone company run by its members. Get rewarded for helping other members or recruiting new ones. Even better, calls and texts to other members are completely free - see the site for full details.
The pay as you go rates are great - compare them to your current provider to see. You can buy a package of calls, texts and data - and change it whenever you want.
For an idea of prices - for £10 a month (buy whenever you need, not necessarily every month) you get
Mobile phones, ringtones, PDAs, landlines and accessories from the largest independent retailer of mobile communications in Europe. Carphone Warehouse prides itself on offering customers consistently simple, impartial advice on everything to do with mobile communications.
Established in 1994, fonehouse began as an independent Mobile Phone Retailer based in and around the city of London. Since then fonehouse has ridden the pressures of intense competition to become one of the most reliable Mobile Retailers in the industry with stores nationwide.
Vodafone is the world's largest mobile phone network with a massive global brand and presence. In terms of coverage it is number 1 in the UK and has pioneered the development of 3G products and services.