A method of using radio signals transmitted for reception by mobile user equipment that includes receiving, with mobile user equipment (UE), radio signals having at least one format; monitoring, with the mobile user equipment, at least one property of the received radio signals; identifying a pattern in said monitored property or properties; and in response to identifying said pattern, triggering at least one action according to the identified pattern, and/or providing the UE with an indication of a location of the UE based at least part of the identified pattern.