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The SGH-A437's compact dimensions (3.7x19x0.6 inches; 2.9 ounces) ensure that it slips easily into a bag or a pocket. It also feels reasonably comfortable in the hand, but we couldn't help notice that the plastic casing felt a bit cheap, and the hinge was a tad loose. This is not a phone we'd feel comfortable throwing around.
The postage stamp external display is monochrome, so it doesn't support photo caller ID. However, it shows all the other information you'll need including the date, time, battery life, and signal strength. A volume rocker sits on the left spine while a camera lens and the headset jack/charger port are located on the right spine.
The internal display measures two inches and supports 65,000 colors. The overall resolution was somewhat disappointing, however. Colors weren't very bright, and most graphics, including the menu icons, were fuzzy. On the upside, the menus are easy to use, and you can change the dialing font size and color.
While the SGH-A437's exterior bears a resemblance to that of the SPH-M500 and the SCH-U340, its interior is quite different. Instead of raised navigation and keypad buttons, the SGH-A437 features completely flat controls. We're still not fans of such a design, as too often flush keys like these are slippery and offer too little tactile feedback. Yes, we understand that flat controls make for a thin phone, but we feel there has to be a better way. The SGH-A437's circular toggle is large, but it's difficult to use by feel and we don't like the OK button activates the Web browser when in standby mode rather than opening the main menu. The two soft keys, the Talk and End/power buttons, and Clear controls are also large, but again, we miss the tactile feedback. On the upside, you can set the toggle to act as a shortcut to four user-defined features, and you also get a second pop-up menu for more favorite features. The keypad buttons are flat as well, though the numbers on the keys are rather large and are lit by a bright backlighting.
The SGH-A437 has a 1,000-contact phone book with room in each entry for four numbers, an e-mail address, and notes (the SIM card holds an additional 250 names). You can save callers to groups, assign them any of 10 polyphonic ringtones, or pair them with a photo--just remember that the photo won't show up on the external display. Other options are plentiful and include a vibrate mode, text and multimedia messaging, a voice memo, an alarm lock, a calendar, a stop watch, a calculator, a tip calculator, a timer, and a world clock. Instant messaging and a speakerphone are also on board, and we like that more midrange phones such as the SGH-A437 are offering Bluetooth.