My account app isn't working on my device. I have a Samsung Galaxy S8+, the app will let me login but it keeps displaying error (Sorry we were unable to connect to your account, please try again). I have called in and done everything tech support ask me to do but still no change.
Is this the username/password you are using?
If you're using the correct username/password and still getting the error, then there probably is a problem between your login profile and your account. A knowledgeable agent would have to identify and resolve the issue. Resetting your login profile or re-attaching your profile to your account is possibly what they have to do. People in the past have had this issue.