Just got myself a spare Vodafone PAYG sim and have put £5 credit on it using my credit card online.
This is a handy sim as there is a flat 50p per day data charge for anything up to 25mb – it’s a “fair use” cap rather than “hard” I think.
The actual sim costs nothing, and you can put as little as £5 on it which would give you up to 10 days browsing. On days you don’t browse you don’t get charged which is far better than sims which charge a monthly data fee irrespective of how much data you actually use!
Anyway, I’ve put it in my Iphone 3gs to test it, and the first thing I notice is that the default APN settings are wrong!
However this does not work! You need to change the settings to: