Setting up Suddenlink.net email manually on Android can seem a bit daunting. But with the help of the below steps, you can get done with it without any trouble.
Open Mail app on your Android.
Select Add Account and Enter your email credentials.
Now click on the Manual Setup option.
You need to select IMAP as your account type.
Enter the for IMAP in the given fields.
Incoming Server: imap.suddenlink.net
Security type: SSL/TLS (Accept all certificates)
Once you have entered all the IMAP settings correctly, hit the Next button.
On the next page, you need to configure Suddenlink Outgoing server settings as follows:
Outgoing (SMTP) server: smtp.suddenlink.net
Security Type: SSL/TLS (Accept all certificates)
Outgoing (SMTP) Roaming Server - Security Type: SSL/TLS, Port:587
Verify the outgoing server settings and hit the Next button.
At last, click on Done to finish the setup.