This document discusses mobile cloud computing (MCC), including its architecture, challenges, trends, and applications. MCC combines mobile computing, cloud computing, and mobile internet to allow rich applications and data storage/processing to occur in the cloud rather than on the mobile device. This helps overcome limitations of mobile devices like limited battery, storage, and bandwidth. The document outlines the background of cloud and mobile computing, MCC models and architecture, challenges like security and standard interfaces, benefits like extending battery life, and trends like increased business usage and focus on security. Popular applications of MCC include mobile commerce, gaming, and healthcare.