If you're the sort of person who loves to play numbers games but is fed up with having to splash out on Sudoku books then why not install one on your mobile? M-SuDoKu is one of about 12 million Sudoku games available for phones, and is compatible with all Java phones (as long as you have a colour screen). As usual, the game is all about the numbers, and you must make sure that the numbers one to nine are distributed correctly within each 3x3 grid, remembering that you can't duplicate a number in any row, column or grid. I'm getting slightly bored of reviewing Sudoku games, such is their prevalence in the mobile phone world. As a result, I always like to see some kind of innovation, or new twist on the puzzle that separates a game from the rest of the pack. Unfortunately, there's absolutely nothing new about the gameplay in M-SuDoKu. There are, however, a few different options that at least add a bit of variety to each game. For instance, you can customize the game background, choose from two difficulty levels and check out online tutorials. It's certainly not the worst version of the game out there, but please Sudoku developers, can we have something a bit different?!