Essential features on the Z310a include a vibrate mode, text and multimedia messaging, an alarm clock, a calendar, a task list, a voice recorder, a notepad, a timer, a stopwatch and a calculator. Higher end offerings are about average. You'll find Bluetooth PC syncing, a unit converter, POP3 e-mail, an Infrared port, and a password saver for securing valuable passwords and PINs.

We're divided on the Z310's VGA camera. Though photo quality was quite good--colors looked natural and objects were distinct--the camera editing options were limited. Though you can utilize a night mode and a self-timer as well as adjust the white balance and color effects, you can't select a photo resolution so you're stuck with 640x480. Also, you get just two photo-quality settings, and you can't silence the shutter sound.

You can personalize the Z310a with a variety of wallpaper, screen savers, and color themes. And in a unique touch, you can select one theme to show during the day (you can choose the hours) and another to show during the night. You also get a choice of message tones, and you can download more sounds with the WAP 2.0 wireless Web browser. Meanwhile, creative types can compose their own tones with the MusicDJ application. Gamers get a choice of four demo titles: Diner Dash, JewelQuest2, Platinum Sudoku, and Tetris, but you'll have to buy the full versions for extended play. Also available for an extra fee are MobiRadio and My Cast weather service.
Performance
We
Speakerphone calls were about the same, though we noticed a bit less static. Callers had trouble hearing us unless we were close to the phone, and there was some noise distortion at the highest volume levels.
The Z310 has a rated battery life of seven hours talk time and 12.5 days standby time. In our tests, we had 8 hours and 30 minutes of talk time.
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