Wireless communication system and wireless network accessing device

A wireless communication system, comprising:

• an intelligent terminal, comprising a first card holder and a first interface, wherein the first card holder is configured to receive a first subscriber identity module (SIM) card, and the first interface is electrically connected to the first card holder;
• and a wireless network accessing device, comprising a second card holder, a second interface, a baseband chip and a switch module, wherein the second card holder is configured to receive a second SIM card, the second interface is removably electrically connected to the first interface, and the switch module is electrically connected to the second card holder, the second interface and the baseband chip so that the baseband chip is selectively electrically connected to the first card holder or the second card holder for purpose of wireless network accessing through the first SIM card or the second SIM card,
• wherein the switch module comprises a plurality of switch units, each of the switch units comprises a movable terminal, a first stationary terminal and a second stationary terminal, the movable terminal is electrically connected to the first stationary terminal in a first status and to the second stationary terminal in a second status, the movable terminal is electrically connected to the baseband chip, the first stationary terminal is electrically connected to the first card holder via the first interface and the second interface, and the second stationary terminal is electrically connected to the second card holder,
• wherein the first SIM card comprises a first power supply terminal, a first clock terminal, a first reset terminal and a first data terminal, the first card holder comprises four first lead terminals which correspond to the first power supply terminal, the first clock terminal, the first reset terminal and the first data terminal respectively, the four first lead terminals are electrically connected to the first stationary terminals of four of the switch units via the first interface and the second interface respectively, the second SIM card comprises a second power supply terminal, a second clock terminal, a second reset terminal and a second data terminal, the second card holder comprises four second lead terminals which correspond to the second power supply terminal, the second clock terminal, the second reset terminal and the second data terminal respectively, and the four second lead terminals are electrically connected to the second stationary terminals of the four switch units respectively.

A wireless network accessing device, being configured to impart a wireless network accessing function to an intelligent terminal, the intelligent terminal comprising a first card holder and a first interface, the first card holder being configured to receive a first subscriber identity module (SIM) card, and the first interface being electrically connected to the first card holder, wherein the wireless network accessing device comprises a second card holder, a second interface, a baseband chip and a switch module, the second card holder is configured to receive a second SIM card, the second interface is removably electrically connected to the first interface, and the switch module is electrically connected to the second card holder, the second interface and the baseband chip so that the baseband chip is selectively electrically connected to the first card holder or the second card holder for purpose of wireless network accessing through the first SIM card or the second SIM card,

• wherein the switch module comprises a plurality of switch units, each of the switch units comprises a movable terminal, a first stationary terminal and a second stationary terminal, the movable terminal is electrically connected to the first stationary terminal in a first status and to the second stationary terminal in a second status, the movable terminal is electrically connected to the baseband chip, the first stationary terminal is electrically connected to the first card holder via the first interface and the second interface, and the second stationary terminal is electrically connected to the second card holder,
• wherein the first SIM card comprises a first power supply terminal, a first clock terminal, a first reset terminal and a first data terminal, the first card holder comprises four first lead terminals which correspond to the first power supply terminal, the first clock terminal, the first reset terminal and the first data terminal respectively, the four first lead terminals are electrically connected to the first stationary terminals of four of the switch units via the first interface and the second interface respectively, the second SIM card comprises a second power supply terminal, a second clock terminal, a second reset terminal and a second data terminal, the second card holder comprises four second lead terminals which correspond to the second power supply terminal, the second clock terminal, the second reset terminal and the second data terminal respectively, and the four second lead terminals are electrically connected to the second stationary terminals of the four switch units respectively.