What kind of phone do you have?
is it android or iphone?
does it look like this? https://support.apple.com/content/dam/edam/applecare/images/en_US/iphone/featured-promo-iphone_6s_2x.jpg
its probably Android then
follow these steps here; http://pop2imap.com/yahoo_android_phone.php
Welcome to Justanswer.com, my name is ***** ***** I will do my best to assist you.
Heres my advice, and this should be a simple and easy fix. Download and install the free yahoo mail app for android phones.. This is the free app
Once you have installed the yahoo mail app on your phone.. Open the app.. And then, when you run the new yahoo mail app, it will only ask you for your y ahoo email address and password. And then you will have an easy way to check your mail and send mail, without having to enter the correct ports and server settings, etc.
The yahoo mail app always works well unless you forget your password. Please try the yahoo mail app and let me know if this works for you, or if you run into any issues using the app or installing it.
I strive to provide great service, and greatly appreciate a 5 star rating clicked and submitted when you are satisfied.. I always answer follow up questions.Dustin S.Senior Technician and Network Switching Systems Operator / Maintainer.