afaik, it cannot be removed, which is pretty stupid really. The default key to MGMNT is 0987654321. After logging in to the MGMNT of your network, one simply needs to play around with the URL to get access to the wireless settings for your network (the actual SSID you use to connect to the internet). Post that the attacker can enjoy free WiFi at your peril. Kudos to airtel
Junk that beetel trash and get some good equipment.
Yes. Have 'tested' it across multiple networks (with consent ). I don't think you can even change the MGMNT key. To check connect to MGMNT using the key I gave you. Navigate to 192.168.1.1 in your browser. Iirc, the option to the change the key is greyed out.
Now. Not many people would know the key. But leaving the network unsecured is a risk one should never take.