Editor's note: The ratings of the Sony Ericsson W580i were lowered after our initial review because of issues noticed during long-term use of the phone.
Sony Ericsson deserves a lot of credit for bringing music to cell phones. Though it was not the first company to develop the idea, its Walkman handsets have consistently combined a robust music player with admirable sound quality. And that was true a long time before the arrival of the ballyhooed Apple iPhone. Now the company has succeeded again with the Sony Ericsson W580i. Inside a sexy slider design are the usual high-end Walkman features, all of which deliver solid performance. The phone comes in white, black, and gray. We examined the gray model for this review but the features are the same on all models. AT&T has picked up the white model and is offering it at a very reasonable $79 with service. Otherwise, you can buy unlocked phones for $269. To find accessories for this phone, see our cell phone ringtones and accessories guide.
With a couple of exceptions, Sony Ericsson still hasn't fully embraced the slider phone trend. In fact, after the Sony Ericsson W850i, the W580i is only the second slider model from the company that we've reviewed. And fortunately, Sony Ericsson was more successful this time around. While the W850i was bulky and had unintuitive controls, the W580i improves on both fronts. We wouldn't be exaggerating if we were to say the W580i is one of the most eye-catching handsets we've seen all year. It has a sleek shape and compact dimensions (3.9 inches by 1.8 inches by 0.5 inch; 3.3 ounces) that make it easy to take on the go. The slider mechanism is well-constructed; we could open it with just one hand but it wasn't too loose. In the phone's Settings menu you can choose to end calls automatically when you close the phone.
The 262,144-color display seems a tad small (2 inches; 240x320 pixels) for the phone's size, but it was nevertheless easy on the eyes. Colors were bright and vivid, and graphics and photos showed up well. Only the screen's brightness level is adjustable. Below are the well-designed navigation buttons, which, as we mentioned, are a step above the unintuitive controls on the W850i. The circular toggle and central OK button are large and tactile, and we liked the blue backlighting. The toggle can be set as a shortcut to four user-defined applications, and you can use it to control the Walkman player when listening to music. Yet we had one small complaint. Though the toggle is raised above the surface of the phone, a raised plastic ring surrounds it. In our experience, our thumb kept hitting the ring when we tried to press the toggle. It's a minor point, but one that's still worth noting.
Other navigation controls consisted of two soft keys, a back button, a clear button, a dedicated Walkman control, and an "Activity menu" button that opens a secondary shortcuts menu. As is the case with other Sony Ericsson phones, there's no dedicated Talk or End controls; rather the soft keys control calling functions when you're talking.
The keypad buttons rest below the front sliding face. That means they're completely flat with the surface of the phone, so it's rather difficult to dial by feel. Also, they feel a tad cheap and they're squashed together, so users with big fingers may want to give this phone a test run first. Some users have complained of the keys cracking, but that's not a problem we've encountered. On the upside, bright backlighting helps for dialing in dim situations, and the numbers on the keys are large.
Completing the exterior of the phone are a charger port on the left spine and a thin volume rocker on the right spine. Also on both sides are narrow light strips that flash when a call comes in. It's a tad gimmicky, yes, but it's an eye-catching touch to an already stylish phone. You can choose from 16 color patterns. A power button and the Memory Stick slot rest on the top of the phone. The power button could be larger, but it's not a big deal. On the other hand, the battery cover on the rear of the phone was almost impossible to pry off. The camera lens is the last exterior element. As it's located on the rear of the sliding face, the shooter can only be used when the slider is up. There's no flash or self-portrait mirror.
The W580i has a 1,000-contact phone book with room in each entry for five phone numbers, an e-mail and Web address, a job title, company name and work address, a birthday, and notes. You can save contacts to groups and pair them with a photo and one of 19 polyphonic ringtones for caller ID. You also can select a video for callers and you can choose a pattern for the side-mounted lights. Other essentials include a vibrate mode, a voice memo recorder, text and multimedia messaging, an alarm clock, a calendar, a task list, a notepad, a timer, a speakerphone (usable after you make a call), a stopwatch, and a calculator.