-You need to have an image filevnit in .GIF image format (unless Verizon has fixed that eternal glitch) on the hard drive or SIM card of your device. Mobile devices must be in desktop mode. Some cellphones don't have have the power or bandwidth.
1) Hover the cursor over or left click or tap the pinwheel icon in the upper tight corner
2) Left click or tap."Account info." This will take you to your Yahoo profile, NOT your YA activity profile.
3) Left click or tap the camera icon in the avatar space. The Pictures folder or image gallery of your device should open up. Navigate to the picture you want, select left clicking or tapping . You might need to left click tap "Open." If you can, center or size the image and then left click or tap "Open."
4)if you see any Save or Accept buttons or hyperlinks, left click or tap them. Server computers can be dumb.
You can then go into your YA activity profile and edit the preferences. The avatar can change very quickly or it may take 2 to 4
days to change. The problem can be any where including you having a memory gap or senior moment, orbit may be beyond Verizon's control.