Global System for Mobile Communication (GSM) modem is really a specialized form of modem that operates over paid subscription bases to an instant network, exactly like a mobile phone. It accepts a Subscriber Identity Module (SIM) and actually performs like a mobile phone for computers. This kind of modem may be used as a separate mobile phone that the computer may use for GSM network capabilities. Traditional modem is attached with computers allowing dial-up connection to other remote computer systems. In addition it functions in a quite similar manner, by having an exception that it sends and receives data through radio waves as opposed to a telephone wire. This sort is an external device connected via a USB (Universal Serial Bus) cable or a serial cable. Commonly it is just a mini device that may be plugged into the USB port or card slot of a PC or a laptop.
Sim vinaphone

It is a communication device like its ancestors having wires, but while the service is on paid subscription bases, it should have installed a SIM card. This card can connect the modem to the appropriate supplier and identifies the unit user to its carrier network. This way, it functions almost like a cellular phone; as a matter of fact, many cell phones utilize SIM cards for the said purpose. The SIM cards actually contain all the user data like subscription, membership and caller’s logs etc. these SIM cards are usually inter-changeable among GSM modems and GSM cell phones. Similarly dial-up modem converts analog signals to digital and vice versa, GSM modems convert digital data to SMS (Short Message Service) message for sending or receiving message on the wireless phone network. SMS messages are small packets of electric data that will be sent and received the same as the info packets on dial-up modem.

GSM Cellular Modem

Several new brands of third-generation (3G) and fourth-generation (4G) expensive smart phones are employing GSM technology so they can are wireless hotspot for computer when required. They can easily be connected to the computer via USB cable or even without a wire over a wide-fidelity (Wi-Fi) network and also via Bluetooth. This enables user to access the Internet service employing their smartphone working as a GSM modem instead of a conventional Wi-Fi connection. All of the users who’ve an unlimited data package on the cell phone, this is a cheaper solution than paying extra for a different Access to the internet, or paying money as a connection fee or perhaps a membership for a public Wi-Fi hotspot.