Screen

The screen on the Lumia 900 is the now pretty much standard 4.3in (109mm) AMOLED display which produces very bright colours and completely 'black' blacks, since they turn off the LEDs when they are not required. There has been some talk on the forums about a purplish tint to the screen on lower screen intensities, and I have seen this on my unit. It definitely becomes more pronounced if you select the Nokia Blue theme, as opposed to the regular Blue theme. It seems to shift to a greyer cast when the screen brightness increases. For me, it's not particularly bothersome, but some people have been getting replacements for their units.

The screen is protected with Corning's GorillaGlass, which provides a very tough and durable surface which is (according to the brochure-ware) scratch and dent proof. I'm not sure if it's visible from the pictures, but the screen actually sits slightly above the edges of the case. Again, not a big deal for me, but some might not like the feel. The screen is definitely a fingerprint magnet. It gets and holds smudges really quickly. It would be cool if Nokia could incorporate some of that hydrophobic, anti-smudge technology Apple uses in the iPhone.

Benchmarks

Thanks to WPBench (available in free and paid versions from the Marketplace), we can get a relative comparison of the Lumia's capabilities compared to the other WP7 phones available. It's certainly not the top of the heap when it comes to overall performance, but it isn't a slouch either.

I just ran the Speed tests, since battery life is largely a function of how you use the device.

Figure 14: Here's the raw results from the speed tests on my Focus S. Many thanks to WPBench for providing a Screenshot capability in the program!

Figure 15: As you can see from this graph of comparison results, the speed of the Lumia 900 isn't at the top of the pack. It's around the #11 mark on this day. The Focus S fares better at spots 5 and 6.

Figure 16: It's nice to see that Nokia is making some inroads into the top 3 of manufacturers.

Figure 17: Clearly, the Mango (7720) version of the O/S still commands the greatest number of phones. The Lumia 900 comes with the 8107 version.