Europemedia.net has some more detail on Vodaphone’s “iPIN” technology that provides a plausible micropayment system for web sites and services. The idea is this: (1) Customer goes to website and and sees something that they want to access. The thing they want costs £x — which could be as low as 5p. (2) Customer sends an SMS message to a number listed on the site. (3) Customer receives a reply containing a PIN number. The user is billed £x to receive the message — so the fee is deducted as a normal part of the customer’s phone bill. (4) Customer types PIN number in to website and accesses the material.