iPhone 6 plus screen issue

[Luke336]

Does anyone know what this might be on the screen. It's there all the time. Only 3 weeks old

[BandOfBrothers]

Hi

Try ->

On the iPhone hold down the Sleep/Wake Button and Home button together until the Apple Logo shows. Then On seeing this Apple Logo release both buttons ,and the iPhone will reset , which has been known to clear most glitches.

If this does not remedy the issue then make a back up to iTunes and or iCloud and restore.

If this does not remedy the fault if you have a local  store create a Genius Bar appointment via this official link from Apple https://www.apple.com/uk/retail/geniusbar/ -> I suggest making an appointment because if they are busy it's possible they will not be able to see you and run a diagnostic on the iPhone.