VZBV says that German law requires customer knowledge of what data is being used and for what purpose. It adds that Apple doesn't have the right to ask for names, addresses, or phone numbers stored in a person's contacts. The court has moreover blocked Apple from giving data to other companies who want it for advertising, VZBV notes.
Apple has sometimes come under fire for its data practices, mainly location tracking. An ongoing US lawsuit accuses of having collected location data through iOS 4 -- even when tracking was turned off -- and sharing it with third parties. Shortly after the issue was discovered, however, Apple insisted it was a glitch, and later patched iOS to reduce the amount of information the firmware stores.