WLAN set up is facilitated using phone number identification between a mobile phone that has access to the WLAN and another mobile phone or a computer that it is desired to have access to the WLAN. A visiting mobile phone is used to send a text message, e.g., SMS message, to a home mobile phone, which has permission to access the WLAN; the text message indicates a request for permission to access the WLAN. The home mobile phone may operate automatically, semi-automatically or manually to provide permission and parameters for the visiting mobile phone to access and to connect to the WLAN or to deny permission and access. A computer may dial the visiting mobile phone, which has obtained permission to access the WLAN, and may retrieve the WLAN parameters and use them to access and to connect to the WLAN.