And by auditing the service usage of 2 Number on December 2014 ,we found that there were the service usage total 47,403 Minutes which paid revenue sharing in rate 85% instead of 80% following condition of contract. It is result the payment of revenue sharing over amount 9,068.04 Baht. Because the limitation of define rate revenue sharing in Report Center system one rate and the revenue sharing was not adjusted following condition of contract.