My first N4 had no visible screen pattern, although in daylight I could see the dot matrix, wasn't a big deal though. However, I recently RMA'd due to a vaulty earpiece and my new N4 has the same pattern in the OP. Very annoying, visible when the phone's off but can also be seen, on occasion, when the phone's on. I don't know if my OCD will last much longer...I'm fighting the urge to RMA again.
Sent from my Nexus 7 using XDA Premium 4 mobile app