A system includes at least one mobile communication network for granting user equipment (UE) subscribed to the network a corresponding data quota comprising a corresponding amount of mobile data the UE can exchange with the network it is subscribed to. The system further includes a broker platform for making available for at least one mobile communication network a corresponding set of further data quotas, the broker platform further receiving a data amount request of a corresponding additional data quota for a UE subscribed to a corresponding network. In response to the received data amount request, the broker platform selects a further data quota from the set of further data quotas corresponding to the network the UE is subscribed to, and provides the additional data quota to the UE through the network the UE is subscribed to by exploiting at least a part of the selected further additional data quota.