Need help programming ancient Motorola 60C flip phone

[Pigwidgin]

We have two ancient Motorola 60C flip phones that are going to be recycled.  I managed to do a Master Reset and Master Clear on both of them but now I'm trying to delete our phone numbers off of them.  I have tried the programming instructions based on the user guide, which is here:

https://www.manualslib.com/manual/466504/Motorola-60c-Series.html?page=150&term=programming&selected...

Basically, it says to just dial 74663+#+Menu+Menu and that gets you into the user activation menu.  Then you supposedly can select NAM1.  Well, when I do this, it goes into some sort of call menu, not the programming menu.  I am doing this when it is powered on with power cord attached.  Is there anyone out there who has fiddled with these old phones and remember how to do this?  I am not sure why it is not working.  Perhaps the phone needs to be in some specific mode other than just powered up?  Do I have to power it on holding any specific keys before entering this set of instructions they specify?

Thanks for the help!