Where is the Profiles Setting on iOS 11.2.1

Hi,

I'm trying to unenrol from the iOS beta testing program. Apple says I need to remove the iOS Beta Software Profile by going to Settings > General > Profiles. Other websites say Settings > General > Device Management. Neither options work because there are no such options under Settings > General in iOS 11.2.1.

Please help.

I didn't find the right solution from the Internet.

References
discussions.apple.com/thread/8211861
Marketing Solution Video

Thanks