As a mobile phone expert you know that, in order to work, a cellphone first needs to associate with a BTS (cell tower).
You also know that you can estimate the cellphone position by knowing that BTS id and its coordinates.
All of that said, I need to receive a clear and documented answer to these questions:
1) does the cellphone knows the BTS id it is currently associated with, or only the BTS knows this information?
2) If the cellphone knows the BTS id, can this information be extracted and used by an application resident on the cellphone?
3) If the answer to 2) is yes, which language (or languages) must be used for developing the above mentioned application, in order to cover a large number (say 85-90%) of current cellphones in Europe?
You must write a report that clearly answers to all questions, and you must also cite authoritative sources that I can verify.
To answer question 3) you need to find data about the diffusion of various models and mobile operative systems. The research is focused on Europe (and South Europe specifically), so don't use data about other countries - e.g. USA - because they are not what I need.
If we are satisfied with your work, we can in the future select you to develop mobile applications for the rest of the project.