It's Multiplayer War with Tank Wars from Guppy Games and Mobliss
"BELLEVUE, Wash., March 24 /PRNewswire/ -- Guppy Games(R) and Mobliss(R) announce a strategic partnership to distribute Tank Wars(TM) to major North American carriers in 2005. Tank Wars(TM), a turn-based strategic single and multiplayer battle game, will be the first Guppy Game title released for BREW and J2ME handsets in the United States. "