Design
The z520's 65,000-color, 128 x 160 display is housed under the front cover while the outside sports a supplementary 101 x 80 color display that can display time, call information, battery and signal strength, and more. The VGA (640 x 480) camera is housed on the front cover as well. The z520 uses an internal antenna-- nothing to snag or break off-- and a five-way button just above the dial pad is used to control most of the phone's menus and features. Up/down buttons on the left side of the phone can be used for quick volume control and menu navigation. USB data and charging ports, as well as a headset port, are located on the phone's bottom edge. And because the z520's front and rear faceplates are changeable with Sony-Ericsson Style-Up covers, you can dress it up to suit your style. The design also incorporates a unique carry handle on the top of the phone.

Calling Features
The z520's phone book can hold up to 510 contacts with multiple entries per contact. A call list remembers your most recent missed, received and dialed calls. The phone's voice activated dialing makes calling your friends, family and associates as easy as saying their names. The phone also features a speakerphone for easy, hands-free talking. In addition to a vibrating alert, the phone supports polyphonic ringtones as well as MP3- and AAC-format ringers, allowing you to use portions of your favorite songs to alert you to incoming calls. There's even a bundled application that lets you mix your own ringtones with up to 16 tracks. Meanwhile, more ringtones can be downloaded from Cingular's MEdia wireless web service. Picture caller ID lets you assign a photo to specific callers. Similarly, a ringer ID lets you assign ringtones to callers. Lastly, users of Bluetooth headsets will find perfect compatibility with the z520a's Bluetooth radio.

Messaging, Internet and Tools
The z520a has all the bases covered when it comes to messaging. Support is built in for sending and receiving text, video, graphics and sound via messages. When used in combination with the phone's built-in camera, MMS opens up a whole new world of messaging fun (Cingular messaging charges apply). Instant messaging is also supported and the phone ships with a built-in email client.

Getting on the Internet is easy with the z520a, as it supports the GPRS protocol. When used with a Cingular data plan and the phone's USB or Bluetooth data capabilities the phone can be used as a wireless modem for laptops and PDAs. There's also a built-in web browser for MEdia downloads and mobile web browsing. Cingular's MEdia service lets you receive and send emails, read news headlines, get weather updates, download games and ringtones, and more. T9 text entry, a technology that makes it easier for people to enter words and text on handsets, is built into the unit-- a plus for mobile email and text messaging users.

A number of handy software tools are bundled with the z520a including a voice memo recorder, a calculator, a calendar, and an alarm clock with a timer and stopwatch. Sony Ericsson Sync Station software lets you synchronize your Microsoft Outlook calendar, contacts, notes and tasks with your phone.

Imaging and Entertainment
The z520a was designed for serious fun. The built-in VGA camera captures stills and video to the phone's 16MB of internal memory. Picture effects and custom screensavers, backgrounds, and themes can be set up to fit your personality.

Java support is built into the z520a, making it a powerful gaming companion for both online and offline games. Games are downloadable via the MEdia service or you can use the handset's USB or Bluetooth data connections to load more games and files onto the phone.

Vital Statistics
The Sony-Ericsson z520a weighs 3.46 ounces and measures 3.27 x 1.81 x 0.94 inches. Its lithium-ion battery is rated at up to 4.5 hours of digital talk time, and up to 300 hours of digital standby time. It runs on the GSM/GPRS 850/900/1800/1900 frequencies. The phone comes with a one year limited warranty.