The Sbcglobal email is a part of att.net email service. which is offering the email services in several states of amearica. Generally, the sbcglobal email works perfectly fine on your all devices. but in some rare cases, users might have trouble in accessing the mail account. when they process the login request. they might see the username or password is incorrect. So here are the guide to fix it on your device. 

How to fix Sbcglobal email account not working problem? 

• you are unable to open the login page on your computer or smartphone, you should check the connection first. most probably, your device is disconnected from the internet. that's why you cannot access the internet. so fix the connection, also make sure that your computer is not being disconnected from the computer. 
• If you are seeing the incorrect username or password error on the computer or smartphone. Please check the username and password on your account. If you don't know the password, you can reset the password. after that, you should try to access the mail account again. 
• When sbcglobal email does not work on the outlook mail application. It can be due to the mail application error. so you need to clear the cache and browsing data. now try to access the mail account using the correct mail settings. 
• Let's remove the current account settings. now configure the mail account on your device again. 

Once you will change these settings on your sbcglobal email account. it should be working fine on your device. For more details, you need to visit sbcglobal.net email not working. There you will find the complete guide.