Review: Nokia Lumia 810 for T-Mobile USA
The 810's display measures 4.3 inches across the diagonal and has 800 x 480 pixels. This stops well short of the higher-resolution displays on the 920 and HTC 8X (also sold by T-Mobile), but it still manages to look good. It is very bright and colorful, and all the on-screen elements are easy to read and see. You will notice individual pixels if you hold it close to your eyes, though. Its best feature is that it is perfectly readable outdoors under a full, sunny sky.
The 810 did well on T-Mobile's HSPA+ network. I carried it around New Jersey and New York City for the better part of a week and it never had any trouble connecting to T-Mobile's voice and data networks. Calls always went through on the first attempt, and the device didn't drop any calls during my tests. Data speeds were slightly inconsistent, but fell in line with what I've seen from other T-Mobile devices tested in the same areas.
The quality of phone calls made with the 810 were quite good. Not only were they free of background noise and interference, but the earpiece produces clear, sharp, and loud sound. When used around the house, you can probably get away with setting the volume about halfway up. If you're out walking a busy city street, crank it up all the way and you'll have no trouble hearing callers. The speakerphone offers equivalent call quality, but the volume isn't quite as impressive. You'll need to stick to quieter rooms to use it. Ringers and alert tones were loud enough to get my attention from several rooms away, though I thought the vibrate alert could have been stronger.
The 810 got through a full waking day consistently over the course of a week with normal use. That means I unplugged it at 7 AM and it was still going at 11 PM or midnight. It didn't have much juice left by the time I went to bed each night, though, and was typically dead by morning if left unplugged. (I kept Wi-Fi and GPS on, but Bluetooth off. I used the 810 to check and read email, Twitter and Facebook regularly, as well as browse the web, download apps, listen to music, take photos, plot directions, and so on.)