What are the email settings on your device? Have you verified that SMTP authentication is properly set up? Give us some details to work with.
Being able to send from home, but not from LTE or other wifi networks, usually means you are configured for an unsecured smtp port 25. Many ISPs still allow their customers to access smtp without authentication but only from a modem directly attached to the ISP's network. When you attempt this from LTE or another network, authentication fails.
Double-check with Frontier for correct settings. I believe you need to be using smtp.frontier.com, port 465, SSL encryption. Enter your full email address (including @frontier.com) for the userid, and enter your password.
I was on port 110. If I change to 465 and turn on ssl then it gives me a warning about pop3
Incoming should be pop3.frontier.com, port 995, SSL.
Outgoing should be smtp.frontier.com, port 465, SSL.
Incoming should be pop3.frontier.com, port 995, SSL.
Outgoing should be smtp.frontier.com, port 465, SSL.
turned the ports to these and now nothing works. outgoing or incoming. need to reset. it just keeps verifying and then gives an error message.
now i deleted an account and it says my pop3 password is incorrect. its the same.
Those servers/ports (with SSL) have worked for me in the past, and appear to still be correct per Frontier's web site. Either something has changed and Frontier has not updated their web site, or perhaps there is something amiss with your particular account?
At this point, I think your best course is to contact Frontier technical support and see if they can resolve the issue. Sorry I couldn't be of more help.