✗ This firmware is not signed. This means you cannot restore to it in Finder, the Apple Devices app, iTunes, or idevicerestore.
| Release Date | April 24, 2018 |
|---|---|
| Upload Date | April 14, 2018 |
| Filename | iPhone_4.0_64bit_11.3.1_15E302_Restore.ipsw |
| Filesize | 2.5 GiB |
| SHA256sum | 64b892c580be1509e45e94a64be70e2e46b444b6cd48844dc7146a9af56ddc5a |
| MD5sum | 058d17d6c4486614cd760e76a0b66872 |
| SHA1sum | dd1d1c8ff8afcd1d5f6f4cf30eb3d12a777beb3e |
| Identifier | iPhone6,2 |
iOS 11.3.1 improves the security of your iPhone or iPad and addresses an issue where touch input was unresponsive on some iPhone 8 devices because they were serviced with non-genuine replacement displays.
Note: Non-genuine replacement displays may have compromised visual quality and may fail to work correctly. Apple-certified screen repairs are performed by trusted experts who use genuine Apple parts. See https://support.apple.com for more information.
For information on the security content of Apple software updates, please visit this website: https://support.apple.com/kb/HT201222