Method for establishment of an even flow of authorization even in a mobile telecommunications network

The invention relates to an operation allowance process flow peer to peer between two terminal user of a mobile telecommunications network, the method being implemented in a platform of the mobile telecommunications network and comprising the steps of : - receiving, from a server of a service provider pair to pair, a request for establishing a flow peer to peer between a first user terminal and a second user terminal, the setup request including a flow identifier , the flow identifier comprising at least one identifier of the first user terminal and an identifier of the second user terminal; - decide whether to allow the establishment of the peer to peer flow between the first user terminal and the second user terminal; - transmit a message authorizing or refusing flow peer to peer network to a gateway in charge of controlling the flow passing over the mobile telecommunications network, the authorization or rejection message comprising the identifier stream.