Asda Mobile has some great SIM-free pay as you go deals that have just been added to their ASDA Mobile site (which normally had about 4 phones - Great choice!! lol) offering up to 72 handset models from all top manufacturers like Nokia, Sony Ericsson, Samsung etc.
All handsets are much cheaper than on play.com and amazon, some around £40!!!
All phones are UNLOCKED and come with a free ASDA Mobile SIM
* 8p per minute to any UK mobile or standard fixed line phone, anytime
* 4p per text
* 20p per MB to surf the internet
* 20p per minute to call any other country from the UK