"We are anticipating very strong demand of Galaxy S III."
Earlier on the call, an exec said that Samsung expects the phone to be the company's "most successful smartphone ever," and the device came up a number of other times during the presentation and subsequent Q&A session, but only this once was the actual name of the handset uttered by a Samsung exec — in this case in response to a question about marketing plans for the smartphone compared to the Galaxy Note. Yi said that a global launch might be a possibility for the Galaxy S III, in case you're wondering.
Having only heard the name, however, and not having seen it in print, it's hard to say what the final spelling might be. It could be Galaxy S III, or Galaxy S3, or even Galaxy SIII, perhaps.