I’ve noticed how there are some builds of iOS and its derivatives that only come preinstalled on devices and don’t have IPSWs. Here’s a table of those builds as I’ve seen them on appledb.dev:
| Version | Build | Device(s) |
| iOS 11.0.1 | 15A8391 | iPhone X |
| iOS 12.3 | 16F8155 | iPod touch (7th generation) |
| iOS/iPadOS 14.5 | 18E198 | iPhone 12 / 12 mini, iPad Pro 11-inch (3rd generation), iPad Pro 12.9-inch (5th generation) |
| iOS 15.0 | 19A341 | iPhone 13 / 13 mini |
| iPadOS 15.0 | 19A342 | iPad mini (6th generation) |
| iOS 15.0 | 19A345 | iPhone 13 Pro / 13 Pro Max |
| iOS 16.0 | 20A357 | iPhone 14, iPhone 14 Pro / 14 Pro Max |
| iPadOS 16.0 | 20A8372 | iPad (10th generation), iPad Pro 11-inch (4th generation), iPad Pro 12.9-inch (5th generation) |
| tvOS 16.0 | 20J378 | Apple TV 4K (3rd generation) |
Does anyone know why these unique builds come preinstalled on devices? Once jailbreaks become available for them, can the root filesystems of these builds be dumped from the devices they’re installed so that these builds can be restored to (if and when the required exploits are developed)?
