Today, mobile phones provide a versatile platform that is able to support a multitude of new applications. However, an inherent obstacle with mobile phones is their limited output capabilities. This poses constraints on the user's ability to find and interact with the software applications installed due to factors such as the limited screen size of the device. The goal of the herein work is to extend the phone's user interface to the physical environment. The user's interactions with the physical environment are through phone touches; thus, explicit and direct. Moreover, in addition to the environment providing spatial awareness visually, the phones also lend their capabilities (e.g. input modalities, display, storage, etc.) to the interaction. The approach taken in this thesis is to support touch-based object interaction through the use of tagging technologies. This involves augmenting the physical environment with devices that can be sensed by the phone. If the data stored on the device represents the physical object, the phone can effectively sense this object. Furthermore, the advantage of tagging technologies is the freedom provided to create a variety of different user interfaces. Currently, the majority of implemented solutions focus on single-tag interaction paradigms whereby the phone reads only one tag to accomplish a goal. In order to explore the potential of touch-based mobile interaction further, mUltiple touches (using multiple tags) could be concatenated to achieve expressive interactions. The contribution of this project is the fut1her analysis of touch-based object interactions and the creation of guidelines for the development of such systems, as well as to establish developer supp0l1 for the future development.