17.2.1 Firmware Download
17.2.1 firmware download — compatible with 25 devices, released 2023-12-19, build 21C66. Download links direct to Apple servers, with signing status verification and SHA-256/SHA-1/MD5 checksum validation. This version is no longer signed, for downgrade reference only.
iPhone (25)
25 devices support this version
| Device | Identifier | Build | Size | Signing | Action |
|---|---|---|---|---|---|
| iPhone 15 | iPhone15,4 | 21C66 | 7.40 GB | Unsigned | Details → |
| iPhone 15 Plus | iPhone15,5 | 21C66 | 7.40 GB | Unsigned | Details → |
| iPhone 15 Pro | iPhone16,1 | 21C66 | 7.57 GB | Unsigned | Details → |
| iPhone 15 Pro Max | iPhone16,2 | 21C66 | 7.57 GB | Unsigned | Details → |
| iPhone 14 | iPhone14,7 | 21C66 | 7.23 GB | Unsigned | Details → |
| iPhone 14 Plus | iPhone14,8 | 21C66 | 7.23 GB | Unsigned | Details → |
| iPhone 14 Pro | iPhone15,2 | 21C66 | 7.38 GB | Unsigned | Details → |
| iPhone 14 Pro Max | iPhone15,3 | 21C66 | 7.36 GB | Unsigned | Details → |
| iPhone SE (3rd generation) | iPhone14,6 | 21C66 | 6.98 GB | Unsigned | Details → |
| iPhone 13 | iPhone14,5 | 21C66 | 7.18 GB | Unsigned | Details → |
| iPhone 13 mini | iPhone14,4 | 21C66 | 7.20 GB | Unsigned | Details → |
| iPhone 13 Pro | iPhone14,2 | 21C66 | 7.29 GB | Unsigned | Details → |
| iPhone 13 Pro Max | iPhone14,3 | 21C66 | 7.29 GB | Unsigned | Details → |
| iPhone 12 | iPhone13,2 | 21C66 | 7.29 GB | Unsigned | Details → |
| iPhone 12 mini | iPhone13,1 | 21C66 | 7.12 GB | Unsigned | Details → |
| iPhone 12 Pro | iPhone13,3 | 21C66 | 7.29 GB | Unsigned | Details → |
| iPhone 12 Pro Max | iPhone13,4 | 21C66 | 7.24 GB | Unsigned | Details → |
| iPhone SE (2020) | iPhone12,8 | 21C66 | 6.78 GB | Unsigned | Details → |
| iPhone 11 | iPhone12,1 | 21C66 | 6.81 GB | Unsigned | Details → |
| iPhone 11 Pro | iPhone12,3 | 21C66 | 6.95 GB | Unsigned | Details → |
| iPhone 11 Pro Max | iPhone12,5 | 21C66 | 6.95 GB | Unsigned | Details → |
| iPhone XR | iPhone11,8 | 21C66 | 6.92 GB | Unsigned | Details → |
| iPhone XS | iPhone11,2 | 21C66 | 7.09 GB | Unsigned | Details → |
| iPhone XS Max | iPhone11,6 | 21C66 | 7.09 GB | Unsigned | Details → |
| iPhone XS Max (China) | iPhone11,4 | 21C66 | 7.09 GB | Unsigned | Details → |