Nowadays, mobile phones and other information and communication technology (ICT) devices collect large numbers of measurements about their users. This review paper provides an overview of georeferenced mobile phone datasets by exploring and summarizing the metadata of multiple datasets based on a literature review. It also presents an abstract model to depict the connections of these datasets, serving as the basis for potential spatio-temporal data mining and geographic knowledge discovery tasks. The summarized metadata table and proposed research topics can be applied as a reference framework to future studies in the area of mobile computing, geospatial data mining, and mobile data collection in the age of instant access.