For most tech gadgets, the rule is immutable: big equals heavy. If you get a big cell phone -- a Droid X, for instance, or an HTC Evo -- you're going to know that it's in your pocket.
So it was something of a surprise to pick up the new Samsung Infuse 4G.
At 5.2 in. x 2.8 in., it's a quarter-inch bigger than the Droid X in both dimensions (though at 0.35 in., it's roughly as thick). The Infuse, which started shipping May 15, weighs only 4.9 oz., compared to the Droid X's 5.6 oz. That's 12% percent lighter -- and you'll notice the difference immediately.
In addition, the Infuse's screen is bigger: 5.50 in. to the Droid X's 5.25 in. And that bigger screen uses Super AMOLED technology, so it's extremely sharp and bright, with rich colors.
The rest of the hardware is on the high end of standard. The Infuse has a 1.2GHz processor. There are two cameras: one 8-megapixel unit on the back that can capture 720p HD and one 1.2-megapixel unit facing the user.
The power button is on the right, a volume rocker on the left, a headphone jack on top, and a microUSB jack on the bottom. (This last is a little unusual; most phones put it along the left edge.) There is no HDMI output. The menu buttons along the bottom are backlit capacitive and are brighter than most.
Samsung's phones sometimes feel flimsy because they're so light. Not so much with the Infuse. The feeling of solidness is helped by a highly textured back cover, which might be necessary to keep a phone this size from popping out of your hand.
Fast 4G performance
If you're looking for fast performance, the good news is that the Infuse is a 4G phone using HSPA+ technology. The bad news is that it's on AT&T, which has well-known network limitations. (Read the Infuse's fine print, and you'll discover that full speed is available only in limited areas.)
My speed tests were performed in New York City, where AT&T has had bandwidth issues for a long time. I was able to reach 8 Mbit/sec download speed once; my speeds tended to range between 3 Mbit/sec and 6 Mbit/sec. That's significantly faster than 3G speeds, but far behind the 16 Mbit/sec I can get with Verizon's LTE network. These speeds will presumably get faster as AT&T continues to improve its network.
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