Choose an OTA for iOS 6.1.6
OTA firmwares cannot be restored to. IPSW Downloads collects them for potential future use. They might also be useful if you're doing research.
Signed OTAs
| ✓ |  | iPod touch 4 | iOS 6.1.6 (10B500) | October 4, 2015 | 835 MiB | 0f3e181913166c8e828d946a545d02cfc08c8e02.zip | Download |
| ✓ |  | iPhone 3GS | iOS 6.1.6 (10B500) | October 4, 2015 | 757 MiB | 903b149c839c0650fd072d47c52599a52cbdd292.zip | Download |
This page omits OTA downloads with version prerequisites. You can view these on this
API endpoint.