I have the correct email and password because I can sign in on my PC just fine but for some reason it gives me this error. "The email address or password you typed isn't recognized. Try again." Then it tells me to register the phone or create a new account. Any help, I love to use the kindle app and it needs to be on my phone.
I had the exact same problem. Do you have 2FA enabled?
Alternate sign-in method
Some devices are unable to display a second screen prompting you to enter a security code, but Two-Step Verification will still be required. Here's how it will work:
Sign in with your password. An error message will occur.
A security code will be sent to your preferred phone. You may also use an authenticator app.
Add ("append") the security code to the end of your password, and click "sign in" again.
You will then be signed in to your Amazon account.
The other method is to enter and get that error message, Amazon will email a one-time use password that you can use for the app
We apologize for the difficulties you may have experienced, when attempting to register a device or app to your Amazon account.
For security reasons, we may require a two-step authentication process when registering certain devices and software applications.
To complete the registration of your device or app, please enter the following One Time Password within the password field on the sign in screen:
This One Time password is time sensitive, so you need to use it within 10 minutes of receiving our email. If your One Time Password expires, please reattempt to register your device with your Amazon account password to generate another One Time Password.