1. A wireless device comprising: one or more modems for enabling the wireless device to communicate over at least two wireless access networks, the at least two wireless access networks comprising a first wireless access network and a second wireless access network; a user interface; memory configured to store a first service policy associated with the first wireless access network, the first service policy comprising one or more first-network policy settings or rules, the first service policy configured to assist in reducing data usage associated with a first service activity over the first wireless access network, the first service activity being less than all service activities available to the wireless device, the first service is policy for enabling control of the first service activity on the first wireless access network that is different from how the first service activity is controlled on the second wireless access network, and a user input indicating whether to apply the first service policy when the wireless device is connected to the first wireless access network; and one or more processors for executing one or more agents, the one or more agents including an application interface agent configured to assist in applying the first service policy by arranging a setting of a software component associated with the first service activity, the one or more agents configured to: obtain, through the user interface, the user input, identify when the wireless device is connected to the first wireless access network, identify attempted or successful data communications over the first wireless access network that are associated with the first service activity, and apply the first service policy to the identified attempted or successful data communications over the first wireless access network, thereby reducing data usage over the first wireless access network associated with the first service activity.