Filed with the United States Patent and Trademark Office (USPTO) last year, the patent describes a system that targets "advertising of goods and services to users of mobile terminals, based for example on the users' profile." "The common profile of users may be based on the amount of pre-paid credit available to each user," the patent says.

Advertisers will be able to choose parameters for the ads, so that a user's profile can be matched up to the most appropriate ad. The profile could include, along with available credit, "age, sex and income level(s), target telephone type, etc."Apple's patent states, however, that this is just an opt-in services, and that the advantage of having such a system in place will mean you won't be seeing ads of things out of your price-range.