Yahoo mail is top email service provider and available own application for android or iOS that any people download from the respective official application stores. If you want to create a new yahoo mail account in android or iOS version, then necessary to download yahoo mail application.
Click on Sign up link situated below the "sign in with yahoo" bu
Enter complete information for your basic info - first and last name, email firstname.lastname@example.org, user password, phone number, DOB, Gender etc.
Click on Continue bu
Now, verify the number by requesting the text message with a code on your phone
Input code and click on continue
Now, successfully confirm and you can use it with your mobile phone.
Read Also - https://emailscrunch.com/yahoo-smtp-imap-pop3-email-server-settings/