A method of method of installing a wireless communications network configures a client device to connect wirelessly to an access point arranged to provide a wireless communications network. The method comprises running an installation program on the client device for configuring the client device to attach to the wireless communications network. The installation program is automatically provided with wireless network configuration information comprising at least a wireless network identifier which identifies traffic using the wireless communications network. The automatic provision of the wireless network configuration information comprising said wireless network identifier is implemented by connecting an installation device comprising non-volatile memory which stores said information, and configuring said installation program to utilize the information stored on said installation device. The wireless network configuration information stored on said installation device corresponds to the wireless network configuration of said access point and both the installation device and the access point were configured with the wireless network configuration information prior to said installation device being connected to any client terminal arranged to connect to said access point.