A mobile device (1-3, 200) for detecting and monitoring a target device used in a facility, the mobile device (1-3, 200) comprising: positional and motion circuitry configured to determine motion data comprising a change in location of the mobile device (1-2, 200); one or more transceivers configured to communicate with a first communication network and a second communication network; and one or more processors configured to: establish a connection with the target device; detect transmissions from the target device communicating on the second communication network; gather information regarding the target device based on the detected transmissions; transmit the motion data of the mobile device and the gathered information on the first communication network to a contraband detection center; receive information from the contraband detection center in response to the motion data of the mobile device and the gathered information, wherein the gathereed information comprises identification of the target device including international mobile subscriber identity number, IMSI, or electronic serial number, ESN, and information on the communication including phone number of an outside communication device; determine whether the target device is authorized to communicate within the facility on the second communication network based on the received information from the contraband detection center; and receive, from the contraband detection center, instructions for performing an intervention operation based on the motion data and the determination of whether the target device is authorized, wherein the motion data is used to determine if the mobile device is in close proximity to the target device to perform the intervention operation. positional and motion circuitry configured to determine motion data comprising a change in location of the mobile device (1-2, 200); one or more transceivers configured to communicate with a first communication network and a second communication network; and one or more processors configured to: establish a connection with the target device; detect transmissions from the target device communicating on the second communication network; gather information regarding the target device based on the detected transmissions; transmit the motion data of the mobile device and the gathered information on the first communication network to a contraband detection center; receive information from the contraband detection center in response to the motion data of the mobile device and the gathered information, wherein the gathereed information comprises identification of the target device including international mobile subscriber identity number, IMSI, or electronic serial number, ESN, and information on the communication including phone number of an outside communication device; determine whether the target device is authorized to communicate within the facility on the second communication network based on the received information from the contraband detection center; and receive, from the contraband detection center, instructions for performing an intervention operation based on the motion data and the determination of whether the target device is authorized, wherein the motion data is used to determine if the mobile device is in close proximity to the target device to perform the intervention operation. establish a connection with the target device; detect transmissions from the target device communicating on the second communication network; gather information regarding the target device based on the detected transmissions; transmit the motion data of the mobile device and the gathered information on the first communication network to a contraband detection center; receive information from the contraband detection center in response to the motion data of the mobile device and the gathered information, wherein the gathereed information comprises identification of the target device including international mobile subscriber identity number, IMSI, or electronic serial number, ESN, and information on the communication including phone number of an outside communication device; determine whether the target device is authorized to communicate within the facility on the second communication network based on the received information from the contraband detection center; and receive, from the contraband detection center, instructions for performing an intervention operation based on the motion data and the determination of whether the target device is authorized, wherein the motion data is used to determine if the mobile device is in close proximity to the target device to perform the intervention operation.