When you can't access AOL mail account on the phone or computer. It means, there is something wrong with the user account or password. here are the guide to fix it.
First of all, you need to reset the password.
Go to the server settings and update the server settings.
Sometimes, AOL mail sign in problem appears on the phone because of the incorrect username or password errors. so you need to remove the current account and then re-add the mail application.
Once you will make these changes into the aol account. it will start working fine. for more details, you need to visit us for more help.