Assigning ringtones to contacts? Is it Possible?

I don't know about contacts as such, but you can to groups (well, at least you could on my ancient 6110, which I see they recycled the name now... another story). So you could put your contacts in a group of one and assign ring tones that way.
Regards

aren't needed .. you can assign a tune to a specific contact without specifying a group (you did way back on the 10.x.x.x firmware)

Select the contact you want from the list, click on it (taking you into it), press options, scroll down to ringing tone then pick what you want from the list it brings up. Enjoy!😊