Review: Samsung DoubleTime for AT&T
The DT has two displays. Both measure 3.2-inches and have 320 x 480 pixels. This is a typical size and resolution for displays... or it was, in 2008. They look okay, but not awesome, and certainly not anything like Samsung's high-end Super AMOLED Plus displays. Both displays are bright, but colors are a bit muted, and there's a slight, pixelated haze that gives icons, graphics, and text a fuzzy look. The displays are hard to see outside.
The DT performed on par with other AT&T devices tested in the same areas. It typically held onto three or four bars of service. I was able to make voice calls when the device showed one bar. It lost the network a couple of times. I did not miss any calls while testing the DT, though. Data performance depended heavily on signal strength.
Call quality with the DT was pretty good. Voices sounded clean and warm in the earpiece, which was loud enough so that conversations can be heard in most environments. I never experienced any noise, distortion, or other radio-based nonsense. The speakerphone also produced clean tones with voices that are present and free of noise. I wish the speakerphone were capable of higher volumes, but it serves fine for use in a quiet room. Ringers and alert tones were plenty loud and the vibrate alert let me know consistently when I had new messages hitting the phone.
Despite having two displays, the DT has excellent battery life. With a 600MHz processor and smaller, less-dense screens to worry about, the DT easily manged to last one and three-quarters days between charges. That means I could unplug it at 7AM and not have to worry about recharging it until about 8 or 9PM the following day. I tested the DT with the Bluetooth radio off, but the Wi-Fi and location services on.