Oh my word! How simple was that? I've just rang up Orange, my mobile phone providers, so that I could ask to change my bills from Pay Monthly contract over to Pay As You Go, and it was amazingly simple. I usually expect to be kept waiting on hold a long time, and then when I get though to an operator they'll try and persuade me to move over to other similarly priced plans, and I thought that was going to happen when he asked why I wanted to do that, but the call lasted around 2 minutes. He said that he'd send out a new SIM card, and once I registered this it would end my other contract, and it also means that I'll still keep the same mobile number I've had for the past 7 years, meaning I won't have to tell EVERYONE about a new number. If they'd made it hard for me I would've just cancelled the contract and gone to another provider.
I looked at the PAYG tariff and it's not too bad. If I top-up by at least £10 a month I'll get 1000 free texts [not bad], and calls are 20p a min to Orange phones and landlines, and 40p a min to other mobiles. Because the calls are quite expensive I'll just use the texts more, and also use my landline more [I currently only have it so I can use my broadband].
I've been meaning to sort my phone contract out for months and am really happy that I have because it'll halve my phone bills, and probably save me around £250 a year. Jurassic Park!
If I find it's not for me then it'll be really easy to go back to contract although I think that most providers are only offering 18 month contracts which is a LONG time.