After his brother Aino and Jalou, Sony Ericsson’s turn to launching Yari in the market. One thing interesting, cell phone sector is focused on gaming. As a cell phone on line gaming, Sony Ericsson has equipped U100i Yari special abilities. For example, the integration of motion sensors and sensor gesture in some specific games and the availability of several games that used to be present at the portable console. Yari is packaged in a slider design with plastic components and a touch of metal. The front of the cell phone is made of glossy plastic material with the concept of glass. Felt slippery to the touch, as opposed to the rear body cover that feels rough like rubber. When opening the slider then will showing the composition standard keypad. Yari features have become typical cirri most of the series Sony Ericsson. Yari eliminate 5-megapixel camera as the mainstay in the photography sector. Button on the cell phone game can be used to support the activities of photographing. For the music business, Yari prepare comprehensive completeness. Some important features are given in Music Player like equalizer and audio plus widening ID3tags information. Two speakers behind Yari refine the audio output. Cell phone is worth a new icon on the Sony Ericsson cell phone gaming sector. Unfortunately, the camera sector seems some class rivals such as Nokia 6720 classic, the Motorola ZN5 and Sony Ericsson C902i better.