A method of promoting network security in a wireless local area network WLAN comprising a plurality of WLAN cells, wherein each WLAN cell comprises a respective wireless access point, the method comprising: at a mobile communication device comprising a processor and memory (216, 218), said mobile communication device being operable as a mobile wireless access point: reading from the memory (216, 218) a WLAN identifier to be used for identifying the WLAN that is known to be used by each of the wireless access points of the WLAN; reading from the memory (216, 218) an indication of a plurality of channels on which at least one wireless access point of the WLAN is known to operate, each of the channels having a distinct center frequency; selecting a channel of the plurality of channels on which the at least one wireless access point of the WLAN is known to operate, the selecting resulting in a selected channel of the plurality of channels on which the at least one wireless access point of the WLAN is known to operate; configuring the mobile wireless access point functionality to operate using the selected channel of the plurality of channels on which the at least one wireless access point of the WLAN is known to operate; monitoring the selected channel for a transmission of the WLAN identifier of the WLAN, the transmission, if detected, indicating that the mobile communication device is within one of the WLAN cells of the WLAN; and upon detecting the transmission, preventing the mobile wireless access point functionality at the mobile communication device from using the WLAN identifier that is known to be used by each of the wireless access points of the WLAN, wherein said preventing the mobile wireless access point functionality at the mobile communication device from using the WLAN identifier that is known to be used by each of the wireless access points of the WLAN comprises disabling the mobile wireless access point functionality entirely at the mobile communication device. at a mobile communication device comprising a processor and memory (216, 218), said mobile communication device being operable as a mobile wireless access point: reading from the memory (216, 218) a WLAN identifier to be used for identifying the WLAN that is known to be used by each of the wireless access points of the WLAN; reading from the memory (216, 218) an indication of a plurality of channels on which at least one wireless access point of the WLAN is known to operate, each of the channels having a distinct center frequency; selecting a channel of the plurality of channels on which the at least one wireless access point of the WLAN is known to operate, the selecting resulting in a selected channel of the plurality of channels on which the at least one wireless access point of the WLAN is known to operate; configuring the mobile wireless access point functionality to operate using the selected channel of the plurality of channels on which the at least one wireless access point of the WLAN is known to operate; monitoring the selected channel for a transmission of the WLAN identifier of the WLAN, the transmission, if detected, indicating that the mobile communication device is within one of the WLAN cells of the WLAN; and upon detecting the transmission, preventing the mobile wireless access point functionality at the mobile communication device from using the WLAN identifier that is known to be used by each of the wireless access points of the WLAN, wherein said preventing the mobile wireless access point functionality at the mobile communication device from using the WLAN identifier that is known to be used by each of the wireless access points of the WLAN comprises disabling the mobile wireless access point functionality entirely at the mobile communication device. reading from the memory (216, 218) a WLAN identifier to be used for identifying the WLAN that is known to be used by each of the wireless access points of the WLAN; reading from the memory (216, 218) an indication of a plurality of channels on which at least one wireless access point of the WLAN is known to operate, each of the channels having a distinct center frequency; selecting a channel of the plurality of channels on which the at least one wireless access point of the WLAN is known to operate, the selecting resulting in a selected channel of the plurality of channels on which the at least one wireless access point of the WLAN is known to operate; configuring the mobile wireless access point functionality to operate using the selected channel of the plurality of channels on which the at least one wireless access point of the WLAN is known to operate; monitoring the selected channel for a transmission of the WLAN identifier of the WLAN, the transmission, if detected, indicating that the mobile communication device is within one of the WLAN cells of the WLAN; and upon detecting the transmission, preventing the mobile wireless access point functionality at the mobile communication device from using the WLAN identifier that is known to be used by each of the wireless access points of the WLAN, wherein said preventing the mobile wireless access point functionality at the mobile communication device from using the WLAN identifier that is known to be used by each of the wireless access points of the WLAN comprises disabling the mobile wireless access point functionality entirely at the mobile communication device.