Review: Samsung DoubleTime for AT&T
The DoubleTime comes with the stock Android browser. It's a good browser, and running over AT&T's 3G network, it performed well in most of my tests. I noticed slower data speed when the DoubleTime had a weak network connection, but otherwise the browser is just the same as any other Android 2.2 phone.
The DT has few customization features outside of the normal options. You can set your own ringtones, wallpapers, adjust the home screens, etc., but there are no themes, no fancy color options, and no alternate modes. It's a stock Android 2.2 device, which doesn't give you much.