You can fix this issue by disabling all or any third-party applications on your iPhone as it may be a reason for the conflict of SBCGlobal email not syncing on iPhone. After you disable the third-party applications on your iPhone, try opening the SBCGlobal email on your smartphone to see if the issue is resolved. However, if it does not work, you can remove your SBCGlobal email account from your iPhone and add it back with the correct email settings configuration.
Visit: https://contactforhelp.com/sbcglobal-email/