A computer-implemented method for modifying operation of a portable processing device configured to scan for wireless signals under a first scan rate. As wireless signals are received in the portable processing device, characteristics of the wireless signals are analyzed, and if the characteristics match one or more characteristics, the operation of the portable processing device is modified. Under one exemplary embodiment, the first scan rate is modified to a second scan rate, where the second scan rate being different from the first. Under another exemplary embodiment, monitoring capabilities in the portable processing device are activated or modified to collect research data on media data. The characteristics may include identification information or messages/commands that are transmitted wirelessly.