The key to mobile payment acceptance is in the hands of customers. In this paper we use the results of the mobile payment survey MP1 in order to identify and roughly weigh the most relevant acceptance criteria. The outcome of the paper is an evaluation scheme containing the covered payment scenarios, important main criteria (security, costs and convenience) and additional functionality requirements for each MP procedure. The scheme is based on empirical results and can assess a given MP procedure with regard to customer acceptance as well as to compare different procedures. The operational MP procedures Paybox, I-mode and Vodafone m-pay are examined and compared according to the scheme. Finally, a prospect is given to possible further development of mobile payment procedures in the direction of an integrative universal mobile payment system (UMPS).