Tap the Yahoo Mail app icon, which resembles a purple box with the phrase "Yahoo! Mail" and a white envelope on it. Doing so should open the Yahoo login page. If Yahoo Mail opens to an inbox, you're already logged into Yahoo Mail. This means that you can change your password without having to reset the old one. This link is at the bottom of the screen. On Android, tap the purple Yahoo Mail box near the top of the screen. It's a blue link near the bottom of the screen. In the text box that's in the middle of the screen, type in your phone number or recovery email address. If you don't know what your recovery options are, enter the email address for the Yahoo email address for which you're trying to change the password. It's a blue button in the middle of the page. Doing so will take you to a page with your phone number partially revealed. This blue button is in the middle of the page. Yahoo will sent a text message to the listed phone number.  If you entered an email address, you'll tap Yes, send me an Account Key instead. If you entered your Yahoo email address, you'll enter the missing numbers or letters from the recovery option Yahoo provides before proceeding. This process will vary depending on whether you used your phone number or an email address:   Text — Open your phone's Messages app, tap the message from Yahoo, and review the 8-character code in the text message's body.  Email — Open your recovery email inbox, select the email from Yahoo (it may be in the Spam folder), and review the 8-character code in the body of the email. Tap the text box in the middle of the Yahoo screen, then type in the code from the message. It's a blue button near the bottom of the page. As long as the code matches the one sent to your phone, doing this will open your Yahoo Mail inbox. . While the Yahoo Mail app doesn't give you an option to reset your forgotten password here, you can change the password as you normally would without having to know the old password.

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Write a summary of the previous text in Vietnamese:
Mở Yahoo Mail. Chạm vào Have a Yahoo account? (Đã có tài khoản Yahoo? Chọn đường dẫn Trouble signing in? (Gặp sự số khi đăng nhập? Nhập số điện thoại hoặc địa chỉ email. Chọn nút Continue (Tiếp tục) màu xanh dương ở giữa trang. Chọn nút Yes, text me an Account Key (Gửi Khóa tài khoản qua tin nhắn) màu xanh dương ở giữa trang. Nhận mã xác minh. Nhập mã xác minh. Chọn nút Verify (Xác minh) màu xanh dương ở cuối trang. Đổi mật khẩu