Microsoft quietly kills Windows 11/10 activation via phone

If you are wondering about official ways, offline Windows activation has been possible to do using the phone. However, it looks like Microsoft has quietly killed off that method as users online have found that they are no longer able to activate the OS using it.

And previously:
https://tildes.net/~tech/1ql4/microsoft_is_plugging_more_holes_that_let_you_use_windows_11_without_an_online_account