HARDWARE:
We can't overstate how high-end the design of the iPhone 4 is. The 3GS now feels cheap and chubby by comparison, and even a phone like the HTC Droid Incredible -- which just came out -- seems last-generation.
Overall, the iPhone 4 outclasses pretty much every smartphone on the market in terms of industrial design. It just comes off like a far more expensive device, like a Mobiado or Vertu -- but better designed. And it's not just the way the phone looks; the materials feel good -- premium -- in your hands.
Apple has made the stainless band around the phone essentially a couple of big antennae, and they seem to be doing a pretty good job at hanging onto radio signals. The big question is obviously whether or not this fixes or helps with the constant dropped calls iPhone users on AT&T's network have gotten used to. Well in our testing, we had far, far fewer dropped calls than we experienced on our 3GS. Let's just say that again: yes, the iPhone 4 does seem to alleviate the dropped call issue.
DISPLAY:
Steve made a huge point about the science behind this technology during his keynote, claiming that the resolution of the screen essentially tops what is perceivable by the human eye. There have been some debates as to whether or not this argument holds water, but we can tell you this: to our eyes, there has never been a more detailed, clear, or viewable screen on any mobile device.
Not only are the colors and blacks deep and rich, but you simply cannot see pixels on the screen. Okay, if you take some macro camera shots or get right up in there you can make them out, but in general use, the screen is free of jaggies of any type, unless you're looking at a last-gen app that hasn't had its artwork updated. Text rendering is incredibly clear and clean -- webpages that would be line after line of pixelated content when zoomed out on a 3GS (say, Engadget or the New York Times) are completely readable on the iPhone 4, though the text is beyond microscopic.
Because Apple is using IPS and LED technology for its screen, the iPhone 4 is mercifully visible in full sunlight, and performance in low light and at extreme viewing angles are favorable. Overall, you simply won't find a better display on a phone, and that's not just lip service.
CAMERAS:
At his WWDC keynote, Jobs said that getting great looking images wasn't just about upping the camera's megapixels, but had more to do with grabbing more photons. Increase the photon count, let more light in, and your images will look better, the thought goes. So Apple's using a newer backside-illuminated sensor that's more sensitive to light in addition to upping those megapixels -- and we must say, pictures on the iPhone 4 look stunning.
In general, we'd have no trouble using the iPhone 4's camera as a stand-in for a dedicated camera. Not only did it take beautiful shots, but the A4 and iOS 4 combo have considerably sped up the time it takes to snap pictures -- it's now almost instantaneous.
SPEAKER:
We've never had a particular problem with the speaker or earpiece on previous iPhones (well, the speakerphone has never been loud enough for our taste), but it's obvious that Apple has done some work on getting both call quality and speakerphone quality up. Beyond making the phone considerably and consistently louder in both places, the clarity of the iPhone 4 is noticeably improved from the previous generation. If you read our review, then you know that we thought Motorola's original Droid had some of the best sounding components we've heard on a phone, and the new iPhone definitely gives them a run for the money.
There's clearly a difference between the sound in the earpiece on the new phone versus the 3GS, and it ranks highly against newer competition like the EVO.
BATTERY LIFE:
This is a big one for many people, and we have some fairly surprising news to report. The battery life on the iPhone 4 has been outstanding thus far, exceeding our expectations for longevity during testing. We've only had a short time to use the phone, but in the week or so we've been carrying the device as our main phone, we've had pretty amazing results under normal to heavy use. In fact, we managed to squeeze more than 38 hours -- yes, 38 hours -- of life out of a single charge using the phone as we normally would. We're talking calls, some gaming, lots of push email and calendar invites, playing music over Bluetooth in the car, and just general testing (like downloading new apps, rearranging icons, tweaking settings). We went from 10:30AM on a Saturday morning till 1:00AM on Monday without needing to charge the phone.
WRAP UP:
We're not going to beat around the bush -- in our approximation, the iPhone 4 is the best smartphone on the market right now. The combination of gorgeous new hardware, that amazing display, upgraded cameras, and major improvements to the operating system make this an extremely formidable package.