A method and terminal are disclosed for use in a wireless communication system, in order for the terminal to transition from a dual mode, in which a packet switched connection and circuit switched connection are used, to a single mode in which packets are transferred. A first inverter circuit includes a pMOS transistor and nMOS transistor having gate terminals connected to the input. The control element receives a password, saves the password to the storage element and provides an encryption and decryption command. The system further includes an uncoupling device and a sensor to remove the skin element from the gap based on a critical angle-of-attack of the airfoil element. The flexible light pipe has a first light pipe interface at a first end of the flexible light pipe and a second light pipe interface at a second end of the flexible light pipe.