With the growing acceptance of multimedia and the Internet, mobile phones are becoming multi-purpose information appliances, incorporating everyday services such as telephone, fax, answering machine, television, chat, games, internet browsing, GPS navigation etc. These mobile devices can now replace the functions of the head mounted displays making augmented reality applications accessible to users on their mobile phone. Augmented Reality has started spreading among people with applications of games, sports, tourist places, shopping and even in viewing things which appear invisible in walls. There are number of electrical cables, water pipes, vents passing over, behind a wall. Sometimes when you need to set up new electrical cables or new water pipes connection inside your wall one needs to figure out the existing circuitry of cables and structure of water pipes before piercing a hole. At some places there are large bunch of electrical cables running over while in some places there are number of water pipes there is no such standard for infrastructure of a building. It depends on area and usage number of things that are structure inside wall. One such example is complicated wire mesh in Boeing aircraft. The electrical assembly of aircraft is highly complex which thousands of cables running through it. Using the augmented reality technique, we can view the infrastructure inside wall for that particular wire which is in reality invisible as it hides behind the wall. This thesis shows how to integrate 3-D virtual objects into a 3-D real environment in real time. It describes the visualization and planning at different places in a home or offices or any places you may visit. We use Qualcomm's Augmented Reality SDK (QCAR) for a mobile device. In this method, we show that a number of 3D virtual walls with a certain scale are stored as an Image Target in an application. The 3D view shows wires, pipes, vents and other infrastructures inside the wall. Thus, we provide a very effective and intuitive way of "annotating" reality.