Abstract—Cloud computing can be considered as a model that provides network access to a shared pool of resources, such as storage and computing power, which can be rapidly provisioned and released with minimal management effort. This paper describes a research activity in the area of mobile cloud computing. It highlights different open issues which are associated with the mobile usage of cloud computing. By establishing a list of criteria for those issues, different solutions are compared against each other. The solutions discussed in this paper focus on different aspects of cloud computing in association with mobile usage. Each of the presented solutions offers at least one satisfactory approach for one of the open issues that are associated with the mobile usage of cloud computing resources. By combining the different existing approaches it would be possible to generate a solution that covers most of the issues currently identified