The immense popularity in mobile internet has driven part of classic web information and services to transform and shrink themselves to match the diversity of web-capable mobile devices. This paper will present a Web-based mashup tool to work with range of Japanese domestic mobile handsets and their variety of limited functionalities. Our purpose is to provide users an alternative option to customize information to be displayed and to integrate available services for their mobile phone. Three major working components, functionality tester, service aggregator and output simulator will aid users in understanding the capability of their mobile device and selecting corresponding functionalities. Successfully simulated and simplified information services will be accessible via user’s mobile phones with correct configurations.