The Samsung SGH-T639 for T-Mobile is a sleek clamshell cellular available in four colors: Red, Navy, Aqua and Olive. It is among the first phones to offer yet to be launched 3 G services. It has a 1.3 mega-pixel camera with video, MP3 music player, Bluetooth, web browser and a micro SD slot for memory expansion. It supports the quad band network and can be used in both Europe and North America.
The phone has an external display, camera lens, a self-portrait mirror and buttons on the side panel. The T639 has an external 128×32 pixel screen resolution and the internal display is a 262 k color TFT screen with a resolution of 176×220 pixels. The phone measures a mere 91 grams and is tiny with dimensions of 94mm x 38mm x 18mm.
You can change the font size, color, and the backlighting in the internal display. There is a provision for a web-browsing key and a control button for user programmable shortcut keys. The phone has a four way toggle button with an OK button in the center and two keys for Talk and End, besides a Clear key. All keys are backlit and large, enabling easy dialing in the dark.
The SGH- T639 has a large phonebook that supports a thousand entries. Under each you can have five phone numbers, two email addresses, instant messaging and web addresses. You can also store their birthdays and addresses. The phone has several polyphonic tunes that you can assign to each caller.
The phone features the myFaves option of T –mobile that gives subscribers unlimited calling to any five numbers on any network. For better security you can synchronize the contacts on your phone with T-Mobile servers.
You can send text and MMS messages and the phone supports XHTML browser. The battery lasts for ten days and gives a talk time of four hours. The sound quality is good though the voice fades if you take the phone away from a specific position. The volume is loud enough and the voice is clear. The only drawback is that the phone does not respond to voice commands.
The phone has the usual tools like an alarm clock; vibrate mode, task scheduler, notepad, stopwatch, world time, unit converter and a calculator. There is a provision for voice recording and a speakerphone.
The camera can take pictures in five resolutions and you can edit them using the three color choices and the twenty fun frames. There is a provision for adjusting the brightness and white balance, a self-timer digital zoom, night mode, multishot and three shutter sounds. The camera menus are also simple and easy to use. The picture quality is reasonable though some photos develop a yellowish tint. You can record videos for as long as you want. However the video clips for MMS messages can be only thirteen seconds long.
The phone offers demo versions of two games and you have to transfer music to the phone using a memory card or a USB cable. The phone comes with a one-year limited warranty. Overall the T639 is a good middle range phone.