A role of sharing broker can be activated on a first mobile device, the role of sharing broker brokering sharing of network resources of at least a first network among a plurality of other mobile devices. Data usage by the first mobile device on at least the first network can be monitored. Responsive to the data usage by the first mobile device on at least the first network exceeding a threshold value, an amount of data usage on at least the first network being shared by the first mobile device among the plurality of other mobile devices can be adjusted.