Software tools SIMcard, usually it as the STK will be remembered. A standard of the GSM is SIMcard, means it can Service various value-added services telecom. This software includes a series of processes from pre-programmed, that is, how to, and how to engage the SIMcard with the outside world, specifies and orders independent of the handset and the network begins. To mediate this tool SIMcard to be able to create communicative, interactive, network, and user to access and control the network. Also, by means of which the SIMcard is able to execute the orders to display menus, or get commands from the user in the phone display.