Firmware restore files for the Apple TV, iPad, iPhone and iPod touch. iTunes checks a version table periodically for new firmware. iPod touch firmware upgrades may have a protected download URL due to that version being a paid upgrade. They can only be downloaded via iTunes or by providing the necessary key. The URLs provided here are only for reference and no files are actually available from this server. Only released firmware is listed here. Missing firmware download links are because Apple have superceded that version before it was ever released as a download.