If I log into an Xbox 360 will my custom profile picture be changed to something else or...

Signing into a 360 won't have any affect on your custom gamerpic. You won't be able to see it on the 360 though so you'll just see a 360 gamerpic there.

Ok thank you just wanted wanted know what would happen to it

Signing into a 360 won't have any affect on your custom gamerpic. You won't be able to see it on the 360 though so you'll just see a 360 gamerpic there.

I have same problem. My custom profile picture changed. But now, anytime I sign in on the profile with the custom pic, I can't see it. I just see the default Xbox one I had prior to the change. But apparently everyone else sees my custom picture. Even
when I sign into other profiles on this Xbox I can see the custom pic, but when I'm signed in on my main one, I don't see it. I remove my profile, power cycled, add my profile again, nothing. I see a snake profile picture on my Xbox, and on my PC, when login
on xbox.com. But my friends see my custom profile picture (Bela Lugosi, Dracula).

Samehere. We are all customers of Xbox Live. Something simple as changing profile picture should work easily.

As someone else has said, you should be able to change it back while playing any 360 game by bringing up the old dashboard. However, if you're wanting that specific picture on your xbox one profile you'll have to find a high res version on the internet
and submit a custom profile picture. I believe someone not super long ago went through and remade a ton of the old 360 pics and posted them to the xbox one subreddit!