So thin, it almost disappears when turned sideways. View the t509 in 3D, or check out a feature presentation.

Design
One look at this phone and you'll wonder where the phone went. The design is simple, refined, and--once again--thin. The numeric keypad resides below a circular five-way control toggle that controls most of the phone's menus and functions. The large, 176 x 220 display supports up to 65,000 colors, while 10.5 MB of internal memory gives you plenty of room for pictures, contacts, and other data. The t509's VGA camera unit resides on the rear of the phone, and there's a port for plugging in the included hands-free headset.

Calling Features
The t509's phone book can store up to 1000 contacts, phone numbers and addresses, while a call list remembers your most recent missed, received and dialed calls. In addition to a vibrating alert, the t509 supports polyphonic ringtones. You can also download additional ringtones from T-Mobile's t-zones service. A speakerphone lets you talk hands-free while you're doing other things, and picture caller ID lets you assign a photo to specific callers. Similarly, a ringer ID lets you assign ringtones to callers. Like all T-Mobile phones, the t509 also supports voicemail, caller ID, conference calling, call forwarding, call waiting, call hold, built-in paging, and access to T-Mobile's 411 service. Lastly, the phone's Bluetooth connectivity means that your favorite Bluetooth headset is fully compatible.

Messaging, Internet, and Tools
The t509 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. Instant messaging clients for AOL, Yahoo!, MSN, and ICQ are included.

Getting on the Internet is easy with the t509, too. It supports the GPRS protocol, as well as the new, high speed EDGE data protocol. When used with a T-Mobile data plan and the phone's USB or Bluetooth data capability, the phone can be used as a wireless modem for laptops and PDAs. There's also a built-in browser for t-zones downloads and mobile Web browsing. T-Mobile's t-zones service lets you receive and send emails, read news headlines, get weather updates, download games and ringtones, and more. T9 text entry, which is a technology that makes it easier for people to enter words and text on handsets, is built into the unit-- a plus for mobile text messaging users.

A number of handy productivity tools are bundled with the t509 including a voice memo recorder, an alarm clock, a calculator with unit converter, and a calendar.

Imaging and Entertainment
The t509's built-in VGA (640 x 480) camera captures stills and video to the phone's 10 MB of internal memory. The camera captures videos of up to 15 seconds in length at 176 x 144 resolution.

Meanwhile, if you want to dress up your t509, picture effects, custom screensavers, backgrounds, and themes can be set to fit your personality. Plus, Java support is built into the t509, making it a powerful gaming companion. Games are downloadable via the t-zones service.