Recently, with the overwhelming growth of Cloud Computing (CC) and mobile devices, Mobile Cloud Computing (MCC) has emerged and become an attractive area of research. Unlike CC, MCC is formed from the properties of mobile devices such as hardware limitation, mobility, etc. Through MCC, the cloud resources are utilized to support mobile devices in heavy computing services and leverage mobile cloud service efficiently. In this talk, we will present an overview of MCC with our on-going deployed architecture, which involves tremendous potential mobile cloud services in future. In addition, mobile devices -based virtual desktop infrastructure (mVDI) emerges an efficient and convenient method in MCC. Relying on the current remote desktop technology to access to VMs on cloud, mobile devices can easily communicate, and utilize the cloud resources. All computational complexity is executed on the cloud servers rather than on mobile devices. Since offloading computing tasks to the cloud, we can run any services/applications regardless of capability of mobile devices. Consolidating many users into mVDI environment can significantly lower IT management expenses and enables new features such as "available-anywhere" desktops. However, there are many barriers to broad adoption including the slow performance of virtualized I/O, CPU scheduling interference problems. In this talk, we will discuss trends and issues, also the corresponding solutions and challenges in future mobile service through Cloud Computing including mobile cloud services, mobile virtualization, mobile DaaS, N-Screened mobile services and mVDI. From this talk, effective business model is also covered by connecting between mobile contents, platform, wearable devices and cloud infrastructure. Also, some implemented test results will be shared to help audiences for future mobile cloud service design.