This usually refers to an iOS App Store Package, indicating this file might be an unofficial port, a modified version of the game for iPhone/iPad, or a utility tool for the mobile version. Summary Analysis
The German word for "phone book" or "directory," suggesting this might be a modification for an in-game contact list or a directory of mod files. gta3sa-telefonbuch-ipa
Ensure the file size matches what was advertised on the download page. This usually refers to an iOS App Store
If you downloaded this from a forum, check user comments for "fake" or "virus" warnings. gta3sa-telefonbuch-ipa