Wierd grey lines

Ive hade my n6 for almost 2weeks now and the thing that annoys me the most is the grey lines on the screen. Does anyone had this problem before? Only solution is to RMA right?

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[Q] I9505 wierd sound when screen on

Hi guys!

The sound started playing 2-3 days ago everytime i power my screen on.
The sound in question

Its not the lockscreen, i dont remember to install any new apk.
The issue is also linked with the infrared sensor not working properly. When im calling someone the screen flashes near my ear (the screen is not black)

Do you know whats causing it?

Many thanks!