How can I change or put a profile picture on yahoo answer?

You can use a photo avatar or a cartoon avatar from another site, and if you have a Facebook or Twitter account, you can also use those avatars. Go to: http://profile.yahoo.com/y/settings/privacy/ - make sure your profile isn't hidden, because if it is, your avatar won't show. In case you want to use a Facebook or Twitter avatar, you need to link those accounts in the Profile options. http://profile.yahoo.com/y/settings/linked-accounts/ You have several options in case you want a photo avatar: a) go to your Yahoo! Answers settings at http://answers.yahoo.com/my-activity > click edit my preferences near your current pic > click "Update photo or avatar", b) go to your Yahoo! Profile at http://profile.yahoo.com/ , click on the current avatar. Now upload a picture or choose one of the pics you've uploaded previously - the format can be bmp, jpg, png, or .gif. Note: if you are on a mobile, you need to switch to desktop mode first in order for this to work.

You have to use a smartphone or PC. But there is an alternative, you may log in to Yahoo! Answers using your Facebook username and password. Your Facebook profile picture will be your Yahoo! Answers profile picture. This is what I did . Try it. Make your browser to accept cookies ,so that Yahoo! Answers will have an easier access to your Facebook account. I advise u to download a good browser: http://mini.opera.com/?act=opts&rnd=1489477604&vid=0x5af7bfdefbaa99f1

I think You have to use a computer but you just need to edit your profile etc