Abstract: A keypad is provided in the present invention. The keypad includes a keypad shell and a keypad circuit board provided within the keypad shell. The keypad shell is provided with at least two subscriber identity module (SIM) card sockets and a first communication module connected to the SIM card sockets and configured to access the Internet. A SIM card switch is provided between the first communication module and the SIM card sockets. Compared to the prior art, the present invention enables, by means of providing the keypad with the at least two SIM card sockets and the first communication module supporting all major operators, the keypad to access the Internet when connected to a mobile terminal, and ensures uninterrupted Internet data access by switching to a SIM card of a different operator when the SIM card of the current operator has weak reception.

Abstract: An electronic device with an extensible display screen and a control method therefor. The electronic device includes: a mobile terminal (10), a protective sleeve (20), and a keyboard (30) and an auxiliary display screen (40) for communicating with the mobile terminal (10) respectively. The keyboard (30) and the mobile terminal (10) are arranged on the protective sleeve (20). The auxiliary display screen (40) is arranged on the other side opposite to a main display screen of the mobile terminal (10). The front and back sides of the mobile terminal (10) may simultaneously carry out display with provision of the auxiliary display screen (40), and thus the electronic device is applicable to a variety of user scenarios. Additionally, a corresponding display may be selected according to different display content of the mobile terminal (10) so as to obtain a better display effect.

Abstract: A keypad is provided in the present invention. The keypad includes a keypad shell and a keypad circuit board provided within the keypad shell. The keypad shell is provided with at least two subscriber identity module (SIM) card sockets and a first communication module connected to the SIM card sockets and configured to access the Internet. A SIM card switch is provided between the first communication module and the SIM card sockets. Compared to the prior art, the present invention enables, by means of providing the keypad with the at least two SIM card sockets and the first communication module supporting all major operators, the keypad to access the Internet when connected to a mobile terminal, and ensures uninterrupted Internet data access by switching to a SIM card of a different operator when the SIM card of the current operator has weak reception.