TP-Link Deco X20 - Change Network Owner; Navigate to Change Owner; Complete Owner Transfer

To disable the wireless function on the main router (Other model)
1. Visit
http://tplinkmodem.net
or router IP address to
log in with the
account you set for the
router.
2. Go to Basic > Wireless
page.
3. Just deselect the box.
It will disable the
wireless function of
your main router.
4. Hit save to keep the
setting.
5. Power the router off
then on again.