How to setup frontier email on iPhone
How do I setup my frontier email on my iPhone
How do I setup my frontier email on my iPhone
You need to contact Frontier support.
http://support.apple.com/kb/HT1277 will walk you through what information you need to ask the Frontier support staff to get the necessary information and will also show you how to add it to the iPhone.
Good luck!
How to setup frontier email on iPhone