Dude, that's EXACTLY what the Nokia oversampling is supposed to solve!
By combining 3 adjacent pixel to form 1 "super-pixel" you reduce the quantum interference by a huge margin. By using Bicubic interpolation, you also smooth out adjacent super-pixels a bit so the resultant picture is smoother (further noise reduction).
As for the Quantum wave interference, photons can interfere with itself & each other when there's an opaque media in its path. In this case, it's the border of the pixels that appear as a black grid under a microscope. This is where the wiring runs.
This interference causes the photon to appear to land in more than 1 place & is completely random. Micro-lenses help by amplifying "direct" waves & deflect incidental waves, IIRC.
More info available here.
The secret lives of photons revealed | physics4me