My name has recently been showing up as a question mark. Is it my smartphone or Yahoo?

It's a glitch on Yahoo's end.

That is a glitch with the avatars causing it to happen.

Mine is doing the same thing. I'm using a desk top computer. It isn't your phone. Once again Yahoo can't get it together.Apparently email notifications isn't working either!

Yahoo. I've been having problems with many parts of the site recently.

Yahoo. Their tech support doesn't care too much about this forum. Case in point, look at my name! lol

It's Yahoo. Same thing is happing to me on the computer.

Its been happening to me for weeks now.

My name is a question mark now -_-

Same for me.