Some iPhone 4 users report dropped signal bars, yellow tint on screen

Posted by:
Date: Thursday, June 24th, 2010, 03:06
Category: iPhone, News

Apple’s iPhone 4 hits the shelves today and while the handset has received good reviews across the Web and in print, there may be some issues to contend with.

According to The Unofficial Apple Weblog, a number of customers have commented that their shipped iPhone 4 units are experiencing problems with yellow tinted displays and disappearing signal bars.

Specifically, some users who received an iPhone 4 early found that the Retina Display on the new handset has a discoloration in the bottom corners of the screen.

“In the bottom 10% of the screen there are three blotches about the size of shirt buttons that discolor the screen a brown/yellow color,” one user wrote.



The issues are remniscent to a problem that plagued early adopters of the iPhone 3G who found their whole screen had a warmer, yellower hue than the original iPhone. Apple later said that the color tint was a deliberate decision.

In addition, others have said that the iPhone 4 occasionally drops signal bars when held in the hand. The same issue was also noted by Walt Mossberg of The Wall Street Journal in his iPhone 4 review. He said the device sometimes registers no bars, or fewer bars than the iPhone 3GS, even though a call can still be placed.

“Apple says that this is a bug it plans to fix,” Mossberg wrote, “and that it has to do with the way the bars are presented, not the actual ability to make a call. And, in fact, in nearly all of these cases, the iPhone 4 was able to place calls despite the lack of bars.”

Stay tuned for additional details as they become available and if you’ve seen this on your end, please let us know.

Additional details surface about iPhone 4′s Retina display

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Date: Tuesday, June 8th, 2010, 07:35
Category: iPhone, News

Perhaps one of the most impressive features of the iPhone 4, the Retina display, was introduced at yesterday’s Apple Worldwide Developer Conference yesterday.

To answer the question of what a Retina display is, Chris Branderick of PC World offered the following tidbits:

“To put it simply, Apple’s figurative Retina display is an LCD that boasts a super high pixel density by squeezing a 960-by-640-pixel resolution into 3.5 inches—a pixel density of 326 pixels per inch (ppi).

The Retina display has four times the number of pixels as previous iPhones; its screen size is unchanged, resulting in double the pixel density. When compared to the now US$99 iPhone 3GS, which has a 163ppi screen with a 480-by-320 resolution, it’s easy to imagine just how this new screen will shine.

While talking about the new display, Steve Jobs went on to detail that after a certain point the human eye fails to distinguish individual pixels. According to the Apple CEO this “magic number,” when visible pixelation is no more, is around 300ppi. Therefore, with the iPhone 4’s screen coming in at more than 300 pixels per inch (326ppi), the display will supposedly always looks smooth and crisp, with no jaggies in sight.

Apple’s retina display also promises an improved contrast ratio. The company claims that the upcoming iPhone 4 will have a contrast ratio four times higher than that of previous models. Beyond the use of more compact pixels the screen, which is a backlit LED, will also adopt In-Plane Switching (IPS) technology to improve viewing angles and enhance color display.

Apple isn’t the first to put a super-high-resolution screen in a smartphone. Google’s Nexus One, for example, features an OLED screen with a resolution of 800-by-480 pixels, but its subpixel arrangement has some issues.”

Stay tuned for additional details as they become available and if you’re attending the WWDC and can offer any hands-on feedback of the iPhone 4, please let us know in the comments.

Apple announces iPhone 4 at WWDC keynote

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Date: Monday, June 7th, 2010, 12:39
Category: iPhone, News

In his long-awaited Worldwide Developers Conference keynote speech, Apple CEO Steve Jobs introduced the fourth-generation iPhone, termed the “iPhone 4″. Per Macworld, the iPhone 4 is 9.3mm thick, or 24$ thinner than the iPhone 3GS and includes new camera with an LED flash on the black, but a second, front-facing camera as well. There are new volume buttons, a mute button, plus a second microphone on the top for noise cancellation. Just like the iPad, it now incorporates a micro-SIM tray.

Apple has also engineered three integrated antennas into the design: one for Bluetooth, one for WI-Fi and GPS, and one for UMTS and GSM.

The iPhone 4 features a new screen technology called a “retina display” which operates at 326 pixels per inch, double the 163 pixels per inch resolution of the iPhone 3GS.

The new display measures the same 3.5″ inches diagonally, but at 960 x 640 it has four times as many pixels as the previous model with an 800:1 contrast ratio that’s also four times that of the iPhone 3GS. It uses the same IPS display technology as the iPad and the iMac for good color fidelity, brightness, and viewing angle.

The new handset also sports the A4 chip, which boasts both a small footprint and good power management. Apple went with the micro-SIM design to save space, mostly for a new battery that, coupled with the new chip, Apple says provides 40$ more talk time. The company says talk time is up from 5 hours to 7 hours; 6 hours of 3G browsing; 10 hours of Wi-Fi browsing; 10 hours of video; 40 hours of music; and 300 hours of standby.

Environmentally, the new iPhone is arsenic free, BFR-free mercury-free, PVC-free, and made from highly recyclable materials.

The handset includes quad-band HSPDPA/HSUPA networking with a maximum of 7.2Mbps down and 5.8 Mbps up.

There’s also 802.11n Wi-Fi wireless networking, an improvement from 802.11g in the previous model.

The iPhone 4 also add a three-axis gyroscope for measuring angular velocity and can figure out pitch, roll, and yaw; and rotation about gravity. The gyroscope plus the accelerometer provide six-axis motion sensing which can be combined with new CoreMotion APIs that developers can call for extremely precise position information.

The iPhone 4 has a new, 5-megapixel camera with 5x digital zoom and an LED flash. It also adds 720p HD video capture at 30 frames per second. The company has also created a version of its iMovie consumer video-editing application for the iPhone. With it, you can record or edit you videos (and add photos as well). Once the video has been recorded, users can add titles, changes themes, and use music from your iTunes library.

iMovie for iPhone will be available for US$5.

For Jobs’ “One More Thing” moment, he sat down on a chair to show off the iPhone 4’s video chatting capabilities. Using either of the two cameras, you can make video calls via a feature called FaceTime between iPhone 4 phones over Wi-Fi only (at least through 2010). Users can also switch between cameras and chat in landscape or portait mode.

The iPhone 4 will be available in both black and white, at US$199 for 16GB and US$299 for 32GB (with the same qualifications and two-year contract with AT&T as in the past). Apple will also add an 8GB iPhone 3GS for US$99.

Jobs said that AT&T is going to make “an incredibly generous upgrade offer.” If your contract expires any time in 2010, you’re immediately eligible for that pricing, for up to six months early eligibility. The iPhone 4 will be available from Apple and AT&T’s retail and online stores, as well as at Best Buy and Wal-Mart stores.

The iPhone 4 goes on sale in the U.S., France, Germany, the U.K., and Japan on June 24th, with pre-orders starting on June 15th. It will ship in 18 more countries in July, in 24 more in August, and in 40 more by the end of September.

Apple also showed off some accessories: a US$29 dock and a US$29 case called a Bumper that comes in white, black, blue, green, orange, or pink.