A first mobile, wireless communication device including a memory and a communication module. The memory is configured to store data associating a first user of the first mobile, wireless communication device with a second user of a second mobile, wireless communication device. The communication module is configured to, based on the data associating the first user of the first mobile, wireless communication device with the second user of the second mobile, wireless communication device, establish a communication link between the first mobile, wireless communication device and the second mobile, wireless communication device. In response to the second user being within a predetermined range of the first user, the first mobile, wireless communication device is configured to automatically receive, via the communication link, notification that the second user is within the predetermined range of the first user.