Case C-543/09: Judgment of the Court (Third Chamber) of 5 May 2011 (reference for a preliminary ruling from the Bundesverwaltungsgericht — Germany) — Deutsche Telekom AG v Bundesrepublik Deutschland (Electronic communications — Directive 2002/22/EC — Article 25(2) — Directive 2002/58/EC — Article 12 — Provision of directory enquiry services and directories — Obligation placed on an undertaking assigning telephone numbers to pass to other undertakings data in its possession relating to the subscribers of third-party undertakings)