A cell phone with software to provide options to auto-respond to incoming text message or phone calls with a pre-stored text message or audio message. Information is received concerning last known locations of portable network devices that attach to a network, and used to compute an approximate location of an obscured network device attached to the network. The data are analyzed whether or not said data fulfill certain criteria with respect to a threshold which is indicative for said interfering effect. The pivotal front members enable product to be pulled forwardly off the shelf, minimizing the spacing necessary between adjacent shelves. Network feedback information indicates one or more performance characteristics of the first network path.