Nokia Lumia 920 Windows Phone 8 Review
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When looking at the SunSpider test, our Lumia 920 notched a 927ms, which smokes every other smartphone we've tested to date, including the iPhone 5. IE10 doesn't necessarily feel like lightning when browsing -- it feels about on par with the iPhone 5 and most Android flagships -- but the numbers sure paint a rosy picture.

AT&T's LTE support is also a plus for this device, but we certainly wish that Verizon Wireless would've received the phone as well; it's LTE network is far more vast than AT&T's. For now, AT&T's LTE network hits just a fraction of the cities that Verizon's does, so you'll need to be located in one of those areas to fully take advantage. However, AT&T's LTE network is so sparingly used right now, speeds are impressive. We found ourselves hitting 20Mbps down and around 7.5Mbps up routinely. AT&T's 3G woes are well-documented, and those in NYC / SF should take the usual precautions before buying the Lumia 920 on a network that has proven to be less than stellar in their neck of the woods. That said, both 3G and 4G performance (as well as Wi-Fi) was great on this phone, and we also loved the subtle notification bar message whenever a nearby Wi-Fi network was in range. This prevented us from having to barge into settings and refresh the list each time; a small thing, but a useful thing.