Abstract: A mobile communication method includes the following steps: local base station information of at least one local base station is received from the at least one local base station. When present mode is under test mode, connection information is obtained to replace the local base station information. A test connection to one of the at least one local base station is established according to the connection information to obtain mobile communication service through the test connection.

Abstract: A communication system and a method adapted in the communication system for monitoring and remote debugging are provided. The communication system comprises a server, at least one terminal device and a customer service team end. The terminal device is to generate a terminal device data, wherein the terminal device further sends the terminal device data either unsolicitedly or on demand to the server, wherein the data processor further generates report files according to the terminal device data. The customer service team end is to retrieve the terminal device data and the report file from the server for to monitoring and remote debugging.

Abstract: An electronic system is provided. The electronic system comprises: a processor, a mobile device, a plurality of expansion ports and an expansion device. The mobile device can work as a standalone system, wherein the mobile device comprises a plurality of first function modules. The expansion device comprises a plurality of second function modules, wherein the expansion device connects to the mobile device through the plurality of expansion ports. When the mobile device and the expansion device are connected together to form the electronic device, the first processor controls the electronic system to perform the plurality of first and second function modules.

Abstract: A system for remote monitoring and surveillance is disclosed in this invention. The system comprises a plurality of cameras, a router, and a server. The cameras are connected with the router separately through a wired or wireless communication protocol. The router is connected with the server through a wireless communication protocol. The cameras capture scenes and convert the captured scenes into a plurality of image signals. The router uses a communication protocol to connect with the cameras, and the router transmits the image signals by a first wireless communication protocol. The server receives the image signals by the first wireless communication protocol, processes the image signals to obtain first images, and displays the first images. A method for remote monitoring and surveillance is also disclosed in this invention.