usage_iface.RequestResource("GSM")
 
     gsm_device_obj = bus.get_object("org.freesmartphone.ogsmd", "/org/freesmartphone/GSM/Device")
+    gsm_device_iface = dbus.Interface(gsm_device_obj, "org.freesmartphone.GSM.Device")
     gsm_call_iface = dbus.Interface(gsm_device_obj, "org.freesmartphone.GSM.Call")
 
     print "Set Functionality: full"
-    gsm_network_iface.SetFunctionality("full", True, "")
+    gsm_device_iface.SetFunctionality("full", True, "")
 
     gsm_call_iface.connect_to_signal('CallStatus', onCallStatus)
 
         print "Interrupted"
         loop.quit()
 
-    gsm_network_iface.SetFunctionality("minimal", True, "")
+    gsm_device_iface.SetFunctionality("minimal", True, "")
     usage_iface.ReleaseResource("GSM")
 
 if __name__ == "__main__":