In my phone this Instead using GConfik,you can install netspeed package, via terminal as ROOT
dpkg -i /opt/N9QTweak/Toggles/netspeed*
The control of netspeed you can find in: Setting -> Applications -> Network speed
(Setting -> Applications -> Network speed -> Enable = On/Off)

apear Like: Setting --> applications --> ¡¡ -->
¡¡-->
¡¡-->
¡¡-->

so why is not like yours???