To uninstall the Yahoo! Mail app for Android:

1. Tap the Apps tab at the bottom of your Home screen.
2. Tap Settings on the Apps screen.
3. Tap Applications on the Settings screen.
4. Tap Manage applications on the Application settings screen.
5. Tap Mail on the Manage applications screen.
6. Tap Uninstall on the Application info screen.
7. Tap OK to confirm.