Q: My iPhone 6 Plus  keeps having lines by the at the top of my screen

Hi Nicky,

What model do you have - your subject line says 6 Plus, text says 6s Plus?

If you have a 6 Plus, there are growing reports of a problem that shows flickering lines at top of the screen. See http://ifixit.org/blog/8309/iphone-6-plus-gray-flicker-touch-death/

(The 6S electronics are laid out differently)

Welcome to the club.  TONS of people are having the same issue.  I'm sorry to say we're out of luck unless Apple decides to step up.  You have three options: 1) Pay Apples $349 (I think) replacement fee and you'll get another 6 Plus that will have the same issues.  2) Pay a third party ~$150 to fix it.  Some will also modify it and put a protective shield over the the logic board to make sure it doesn't come loose again.  3) Wait for Apple to own up to it and offer some kind of recall.  No matter which you choose you should contact MccuneWright (Google the website, unsure if I can link without my comment being moderated and deleted). They are putting together a class action to put pressure on Apple to take responsibility.

Just know you're not alone.  My phone is is the same boat and I don't know what to do.