I retired in 2012, but at that time my employer had completely subcontracted the operation and maintenance of its mobile network to Ericsson, Huawei and Nokia.

I retired in 2012, but at that time my employer had completely subcontracted the operation and maintenance of its mobile network to Ericsson, Huawei and Nokia. It was in France. Once I asked for a one day snapshot of all mobile data for a cooperative R&D project. The saga went on for months with repeated requests at various hierarchical levels, but to no avail. It's not that they refused, but I guess that the guys in charge simply were unable to get the requested information from the subcontractors.