A location determination subsystem of a mobile device can determine a location of the mobile device. A monitoring subsystem of the mobile device can be configured, using a profile, to monitor states of a wireless connection between the mobile device and a communications network. When the monitoring subsystem detects an interruption of the wireless connection, a virtual geofence can be constructed around the location of the mobile device when the interruption occurred. The geofence can indicate a boundary of an enclosed geographic area. The geofence can be associated with a diagnostics profile stored on the mobile device or dynamically retrieved from a server upon occurrence of the interruption. When the mobile device enters the area enclosed by the geofence, the monitoring subsystem can be configured using the diagnostics profile in anticipation of interruptions of connections. Information relating to the interruptions can be anonymously sent to a server for analysis.