The SGH-X507's internal display supports 65,000 colors and measures 1.75 inches. Though it's not particularly bright or vivid, it gets the job done and is fine for this caliber of phone. The simple menus are easy to use, and they feature animated icons. You can change the display's backlighting time, contrast and brightness, and the font color and style.
The navigation controls are standard Samsung. There's a rectangular four-way toggle that doubles as a shortcut to four user-defined functions. The control in the middle of the toggle functions as an OK button only when you're in a menu; otherwise it takes you directly to the Web browser. The SGH-X507 also has two soft keys, a Clear button, and the Talk and End/power buttons. The keypad buttons are easy to use, for the most part. They have a tactile rubberized feel and we like that they're raised above the surface of the phone. Our only caveat is that the backlit keys may be too small for some users.
The SGH-X507 has a generous 1,000-contact phone book with room in each entry for five phone numbers, an e-mail address, and notes. If you're really popular you can save an additional 250 names on the SIM card. For personalization you can save contacts to groups and pair them one of 10 polyphonic ringtones. You can assign contacts a photo as well, but they won't be of much use since the external display doesn't support photo caller ID.
Other features include a vibrate mode, wireless modem capability, a speakerphone, a voice recorder, an alarm clock, a calendar, a calculator, a unit converter, a timer, a stopwatch and a world clock. The SGH-X507 also supports text and multimedia messaging, and it can play videos received in a MMS. And for even more ways to communicate, the phone offers instant messaging and e-mail. The SGH-X507 comes with 3MB of internal memory.
You can customize the SGH-X507 with a variety of wallpapers, graphics, color skins, and alert tones. Or, you can write a personalized greeting. The phone comes with demo versions of Tetris, JewelQuest, Midnight Pool, and World Poker Tour.
We tested the quadband (GSM 850/900/1800/19000) SGH-X507 world phone in San Francisco using Cingular service. Unfortunately, call quality was unreliable. Though some conversations sounded fine, other calls were quite garbled and distorted. The latter didn't happen too often but it was enough to be bothersome given that there was no real pattern to the call quality. On their end, callers reported fewer problems. The phone picked up wind noise but callers could understand us. Speakerphone calls were average: not terrible, but not great either.
The SGH-X507 has a rated battery life of 5 hours talk time and 8 hours standby time. In our tests, we managed to get a talk time of 4 hours and 56 minutes. According to FCC radiation tests, the SGH-X507 has a digital SAR rating of 1.27 watts per kilogram.