  In this contribution we summarize insights on the geographical veracity of
using mobile phone data to create (statistical) indicators. We focus on
problems that persist with spatial allocation, spatial delineation and spatial
aggregation of information obtained from mobile phone data. For each of the
cases, we offer insights from our works on a French CDR dataset and propose
both short and long term solutions. As such, we aim at offering a list of
challenges, and a roadmap for future work on the topic.
