Any Sms Payment Service In Nigeria?

We would like to know if there is any SMS payment service in Nigeria. We are talking of a situation where you can Pay for a service by sending text (sms) message from you GSM/3G phone and then you get a return text code with which you may access a website etc. Any similar service existing?

Please inform us in this thread if any such service exists and which company is offering it. Any link to their website will be appreciated.