Method of automatically selecting legal communication channel used by mobile electronic devices and mobile electronic devices using the same

A mobile electronic device comprising:

• a first wireless interface;
• a second wireless interface;
• and
• a processing unit that controls the first wireless interface and the second wireless interface, the processing unit is configured at least for:
• receiving, through the first wireless interface, a country code that represents a geographical region information;
• in response to receiving the country code, accessing a channel range lookup table to obtain a legal range of communication channels according to the country code;
• setting up a Wi-Fi access point using the second wireless interface by using a first channel of the legal range of communication channels so as to make the Wi-Fi access point connectable by an external device through the legal range of communication channels;
• and
• switching the Wi-Fi access point from using the first channel to using a second channel of the legal range of communication channels without receiving another country code through the first wireless interface in response to a need for changing a communication channel.

A non-transitory storage medium containing computer readable programs which are executed by a processor unit of a mobile electronic device to perform functions comprising:

• receiving, through a first wireless interface, a country code that represents a geographical region interface;
• in response to receiving the country code, accessing a channel range lookup table to obtain a legal range of communication channels according to the country code;
• setting up a Wi-Fi access point using a second wireless interface by using a first channel of the legal range of communication channels so as to make the Wi-Fi access point connectable by an external device through the legal range of communication channels;
• and
• switching the Wi-Fi access point from using the first channel to using a second channel of the legal range of communication channels without receiving another country code through the first wireless interface in response to a need for changing a communication channel.