I'm back after a quick test: Same number color patches (represented on iPhone with myPntone app and on N900's built-in image viewer in sRGB jpeg file) look very close to each other on both devices. I mean same far from the paper sample. Viewing angle problem on N900 presents but fractions of the iPhone's strengths. I can conclude from the test that Pantone didn't do its job well; they could make an app more fine-tuned, preciser. But this is a huge amount of work. May be next release will be better.