Abstract: A subscriber identity system may be provided. The subscriber identity system may include: at least one Virtual SIM Host; a memory configured to store an authorization certificate; a transmitter configured to transmit to a server a request for Virtual SIM Essence, the request including data based on the authorization certificate; a receiver configured to receive from the server the Virtual SIM Essence.

Abstract: A method for executing an agent code, wherein the agent code is saved in a read only memory, wherein an agent record containing data is saved in an erasable and programmable memory device, and wherein the method comprises the following steps: reading the agent code from the read only memory and loading it into a processing device, executing the agent code, thereby initiating reading the agent record from the erasable and programmable memory device and loading it into the processing device, and executing the agent record in the processing device.

Abstract: An apparatus and method for detecting the closure of one of several switches using a single input line of a detector is disclosed. The input line is also used to carry an audio-frequency signal when a recording switch is closed. The switches are connected to a network of resistors that cooperate with a pull-up resistor to form a voltage divider. The pull-up resistor is connected to the input line. The switches are closed to selectively switch resistors in the network out of the voltage divider to change the voltage on the input line. A detector reads the voltage on the input line and compares it with a set of predetermined values to determine which switch is closed. If a recording switch is closed, a microphone connected to the network of resistors converts sound to an audio-frequency signal onto the input line.

Abstract: A method for executing an agent code, wherein the agent code is saved in a read only memory, wherein an agent record containing data is saved in an erasable and programmable memory device, and wherein the method comprises the following steps: reading the agent code from the read only memory and loading it into a processing device, executing the agent code, thereby initiating reading the agent record from the erasable and programmable memory device and loading it into the processing device, and executing the agent record in the processing device.

Abstract: A computer-based method is provided for auto-determination of connection type between a Personal Digital Assistant (PDA) and a desktop computer. Current common connection types include serial, USB and infrared. The present invention uses an assertion signal such as a Clear To Send (CTS) signal to distinguish serial connection. With the present invention, the user does not need to set connection type manually. Instead, when the PDA is docked or connected, determination of connection type and synchronization of data follow without user intervention.