Nokia confirmed that the Lumia 900 4.3 inch ClearBlack AMOLED has no Pentile. The Lumia 800 has a Pentile RGB pixel array. The Lumia 900 has full battery of subpixels in an RGB array. Check out the differnt at our Super-Amoled site. It is possible that Nokia purchase the ClearBlack AMOLED Displays from LG-Display or Samsung Mobile Display.
Source:Twitter
The problem with new nokia phones is not in the hardware…The main problem is the partner they choose for software…