There are various ways to set up Yahoo mail on Android phone. Yahoo recommends using the Yahoo Mail app that you can download from the Play Store and get the best of your Yahoo Mail account. If you don't want to use the Yahoo Mail app, you can also set up your Yahoo email directly on the Android Mail application. The procedure is simple, you just need to click on the Add Account option on your mail app and enter your email credentials. Once you've entered your email data, don't forget to hit the Sign In button.