Review: Samsung Focus S for AT&T
The Zune player is functionally and graphically rich. The player interface itself is easy to navigate and use, and the on-screen controls make interacting with your tunes easy. I like the other parts of the Zune app as well, which pull down info about your artists, and provides suggestions on other music services you might use.
Speaking of which, AT&T Radio is the only other music app installed; you'll have to download others from the Marketplace.
Samsung did nothing to provide anything beyond the stock Mango video player tools. HTC, for example, added its own movie rental service and YouTube application to the Titan. With the Focus S, you're stuck with fewer options unless you go diving into the Marketplace.
AT&T did load its U-Verse mobile service, which lets subscribers of its U-Verse television services access some of their content from their phone.