The CU400 offers style and incredible multimedia functions.

Design
The CU400 design takes the standard clamshell form factor to the next level with its impressive media and data capabilities while maintaining a stylish exterior. A large 176 x 220 color display with over 65,000 colors dominates the inside of the top cover. The outside cover of the handset sports a supplementary 96 x 64 full-color display that can display pictures, time, call information, battery and signal strength, and more. A 1.3 megapixel camera lens is housed above the external display, while most of the phone's features and on-screen menus are controlled by a five-way center button on the handset's backlit control pad. Lastly, the right side of the phone houses the Push to Talk button, as well as up/down volume controls.

Calling Features
The CU400's internal phone book can hold up to 500 contacts while the phone's picture ID system allows you to assign pictures to your most common callers. It also supports polyphonic ringtones, and comes stock with 10 unique ringtones built right into the unit, while more ringtones can be downloaded from AT&T Wireless' MEdia Net service. For times when you want to be discreet, there's a vibrating alert, and a built-in speakerphone makes it easy to talk without having the phone to your ear. Meanwhile, voice activated dialing makes calling your friends, family, and associates as easy as saying their names.

Because the CU400 is Bluetooth enabled, wireless headsets can be configured with the phone for total handsfree operation.

The CU400 is fully compatible with AT&T's latest Push to Talk technology, a feature that allows you to place calls with the simple touch of a button (AT&T Push to Talk charges apply). AT&T's Push to Talk feature lets you see whether family, friends, and coworkers are available to talk before you call, while the feature also lets you place a call individually, or call everyone at once via group call. Need to stay hands free? The unit's Push to Talk feature is fully compatible with your favorite Bluetooth headset.

Messaging, Internet and Tools
The CU400 is a messaging and wireless Internet powerhouse. With UMTS and HSDPA support built right into the phone, you'll be streaming and downloading at speeds so fast your head will spin. Used in combination with one of AT&T's MEdia Max plans that supports AT&T Video (additional AT&T charges apply), the CU400 will allow you to play high-quality news clips, sports clips, weather clips, and more--right on your phone. And with AT&Ts exclusive partnership with HBO Mobile and HBO Family Mobile, you'll never be at a loss for something good to watch.

Into sending and receiving pictures, text, graphics, and sound and video via messages? When used in combination with the phone's built-in still and video cameras, MMS opens up a whole new world of messaging fun. Instant messaging is also supported via AOL Instant Messenger, MSN Messenger, Yahoo! Messenger, and ICQ (AT&T messaging charges apply). There's also a built-in web browser for MEdia Net downloads and mobile web browsing. AT&T's MEdia Net service lets you do more than just stream videos--it 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 email and text messaging users.

Getting on the Internet is easy with the CU400. When used with a AT&T data plan and the phone's Bluetooth or USB data capability, the phone can be used as a wireless modem for laptops and PDAs. And as an added convenience, voice and data features can be used simultaneously--so you'll never have to worry about missing that important call.

A number of handy software tools are bundled with the CU400 including a voice memo recorder, a calculator with a unit conversion feature, a calendar and an alarm clock. The CU400 will also allow you to upgrade the phone's software over the air without ever having to plug the phone into anything.

Imaging and Entertainment 
The CU400 features support for Java based games and applications, so you'll never be at a loss for something fun to do. And because the phone supports MobiRadio, in addition to streaming video and TV, you can listen to your favorite radio station via the supported digital radio service--great for times when you feel like listening to new music (additional AT&T charges apply).

The phone's 1.3 megapixel camera features a 4x zoom, image quality options, a camcorder mode, and an auto-timer so you can be in your pictures, too. Capture stills and then send them to your friends via MMS messaging or email, or to your PC via USB or Bluetooth. The CU400 also supports custom graphics for wallpapers so you can dress up the phone to suit your fancy.

Lastly, the CU400 sports an airplane mode feature, which allows you to safely use the non-wireless functions of a phone (such as music, games or organizer functions) on an airplane during flight.

Warning: If you want to enjoy the full audio and video capabilities of your UMTS phone, please select a MEdia Max service plan option during checkout. If you do not sign up for a MEdia Max service plan option, you will be paying per KB when you use the over-the-air UMTS audio and video features on your phone (upwards of $10 per minute).