* @exception E_SUCCESS The method is successful.
* @exception E_PRIVILEGE_DENIED The application does not have the privilege to call this method.
* @exception E_SYSTEM A system error has occurred.
+ * @exception E_UNSUPPORTED_OPERATION The device does not support the telephony feature. @b Since: @b 2.1
* @remarks The specific error code can be accessed using the GetLastResult() method.
*/
static int GetRssi(void);