If you are a curious person and looking to know how to change your yahoo password on your iPhone then you are at the right place just follow the link given below.
On your iPhone open the yahoo mail app
Click on the menu icon (three horizontal bars)
Click on the manage account
Then click on account info then security settings
Enter the security code
Click on the change password and choose ‘i would rather change my password’
Enter your new password and you are done.