I have a AT&T phone that is not up for renewal but i want to upgrade my iphone 5?

I have a AT&T line that i want to upgrade but is not up for renewal and another line on the account is a unused business line can i take that lines renewal and use it so i can upgrade my iphone 5 to Note 3 without paying like 600$ to do so?

You can use that line to upgrade and then simply take out your sim and put it in the new Note 3 that you get for that line. Your sim right now is a nano sim and the Note 3 takes a microsim so you will have to get that changed. But ATT will do that for you for free.

Hope this helped.