Download-gm40e-telefonbuch-ipa

: Go to Settings > Privacy > Contacts and ensure the app has permission to access your phonebook.

: If you have a legitimate .ipa file provided by an IT department: download-gm40e-telefonbuch-ipa

Use a tool like or Finder (on macOS) to sideload the app onto your device. : Go to Settings > Privacy > Contacts