Thank you for your message. Basically, you are asking if our system supports MAC address authentication. The answer is yes, our system does support MAC address authentication. You have to enter the MAC address of your mobile phone in the administrator settings of your router. In order to find the correct setting, it depends what firmware type you have installed on your router. You can find this information but also other useful articles about our system in our knowledge base: http://www.hotspotsystem.com/hotspot_help/kb/articles/91-do-you-support-mac-authentication