How are you receiving your emails now? Sounds like you are wanting to make the transition from pop to imap, but maybe I am misreading your question.
Personally, when I have read emails on laptop, they are marked as read when I see them on my phone. And vice versa. This is because I use IMAP to retreive my email from both, as pop will download them and removed them from the mail server.
Totally depends on your email carrier. They usually have directions on their site.