iPhone fingerprint sensor worth it

2013-09-18 17:45
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Apple new iPhone 5C and 5S

Apple has unveiled two new iPhones in its bid to expand its share of the smartphone market. See all the pictures.

Cupertino - Passcodes are such a pain that I've relaxed the security settings on my Android phone. I'm willing to forgo the extra safety, just so I'm asked to punch in the code less often. When I got my hands on Apple's new iPhone 5S, one of the first things I tried was a feature that allows you to bypass the passcode using a fingerprint.

I had a lot of fun unlocking the phone over and over again. Who knew biometric authentication could be such a blast?

The fingerprint sensor alone is worth the extra $100 you'll pay for the 5S over an iPhone 5C. Both phones will come out on Friday (in the US). In the week I've had with both, I've also been impressed with the better camera and slow-motion video in the 5S.

The 5C, meanwhile, is largely last year's iPhone 5 with a plastic casing instead of aluminium and glass. This isn't cheap plastic, but a type offering the slippery feel of a shiny ceramic tile. It comes in five colours.

Both phones come with iOS 7, the most radical change to Apple's operating system software for mobile devices since its 2007 début. Many of the changes are cosmetic, but there are functional improvements such as easier access to frequently used settings and apps.

When you set up the 5S, you're asked to tap the home button with a finger several times so the phone can create a mathematical representation of your print. To unlock the phone, you simply tap the home button, and the phone will compare the two taps.

You can tap from any angle, even sideways or upside down. This fingerprint ID also works as a way to authenticate the purchase of apps and content within apps.

For security reasons, there are still times you'll need your four-digit passcode, including after 48 hours of inactivity and before adding a new fingerprint. If the phone fails to recognize your print, you can always use the passcode. I had trouble only when my fingers were wet or greasy.

One evening, I ordered pizza with an oily pepperoni topping and ate it without a napkin. The fingerprint sensor worked after one slice, but not two. Indian naan bread also threw off the sensor.

Cutting off a thumb wont work

Apple says it stores the print data on your phone, in a place that's inaccessible to other apps or to Apple's remote servers. The company also says it's not possible to convert a fingerprint from a police file into something the phone will recognize, as the sensor reads a sub-epidermal layer of the finger. And the finger needs to be live - cutting off a thumb won't work.

I'm convinced Apple has given a lot of thought to security. If you're still uneasy about the fingerprint scan, you can stick with the passcode. The feature is optional.

Meanwhile, the 5S's camera takes better night and indoor shots. Although the main camera remains at 8 megapixels, individual pixels are larger and thus better at sensing light. The camera's shutter also opens wider to let in more light. For flash shots, the camera fires two bursts of light at once, each slightly different in colour. The iPhone adjusts the combination of the two colours automatically to match ambient lighting.

I typically avoid using the flash in any camera because its strong burst of whitish light overpowers whatever is in the room. In a hallway with strong yellow light, for instance, the flashes on my high-end camera and the iPhone 5 made the walls white.

The 5S, on the other hand, managed to preserve the yellow. I also got better skin tones on some flash shots taken with the 5S. Using the 5C, faces and arms looked more pale.

Apple's faster A7 processor

Night shots without the flash are also sharper. Sometimes, cameras overcompensate for low light by making the few points of light too bright. The 5S typically has those scenes properly balanced.

Of course, these improvements won't make all photos better. Many shots appear the same whether taken with the 5, the 5C or the 5S. In other shots, differences are subtle.

The 5S can also shoot slow motion video. You can choose the parts you want in slow motion and regular speed, and you can change your mind later. A burst mode lets you snap 100 shots in 10 seconds, compared with 40 seconds on the 5C. The phone picks out the best moments and filters out duplicates.

The front-facing camera is better than the one on previous iPhones. It has larger pixels for low-light video conferencing.

Many of these features are possible because of Apple's faster A7 processor. A companion chip, the M7, handles motion-related data without draining as much of the battery, something useful for fitness trackers. All this power is so new, apps taking advantage of them weren't available for me to test.

Apple is discontinuing last year's iPhone 5, but will still offer the 2011 edition, the iPhone 4S. That's now free with a two-year agreement.

Anick Jesdanun, deputy technology editor for The Associated Press, can be reached at njesdanun@ap.org.

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