How to update twitter profile
In twitter you can change username, email, phone number, profile picture whenever you want without limit. Follow this article to get through.
Update twitter profile.
Update user infomation
Step 1: Open menu at profile icon, select "view profile".
Step 2: Click "Edit profile"
Step 3: Change your display name, bio, .... then click "Save changes".
Update account infomation.
Step 4: Go to https://twitter.com/settings/account or select "Settings" from dropdown menu.
Step 5: At this screen, change username, email, timezone or language display. Click "Save changes" to finish.