Disabling radio would have disabled all WLANs.
An unleashed network can be managed from anywhere through the mobile app, If you have enabled "Remote Management" option already. -Provided AP is reachable to the internet.
In case you have not enabled RM option or AP is not in the reachability of the internet, then you would need a laptop connected to the wired network where AP is connected. You can reach AP by the web interface.