Windows
- Install the latest version of iTunes from the Microsoft Store.
- Plug your iPhone 4 (GSM) in to your PC.
- Open iTunes, and navigate to your iPhone 4 (GSM).
- Hold the Shift key on your keyboard, and press "Restore".
- Select the
iPhone3,1_7.1.2_11D257_Restore.ipsw
file that you downloaded.
- Wait for the restore to complete, and the iPhone 4 (GSM) to reboot.
macOS
- Plug your iPhone 4 (GSM) in to your Mac.
- Navigate to your iPhone 4 (GSM) in Finder.
- Hold the Option or Alt key on your keyboard, and press "Restore".
- Select the
iPhone3,1_7.1.2_11D257_Restore.ipsw
file that you downloaded.
- Wait for the restore to complete, and the iPhone 4 (GSM) to reboot.
Linux
- Install idevicerestore.
- Plug your iPhone 4 (GSM) in to your PC.
- Open a terminal, and navigate to the IPSW file that you downloaded, e.g.
cd ~/Downloads
- To perform a full erase restore, type
idevicerestore -e iPhone3,1_7.1.2_11D257_Restore.ipsw
and press enter.
- Wait for the restore to complete, and the iPhone 4 (GSM) to reboot.
Windows
- Open PowerShell, and navigate to the IPSW file that you downloaded, e.g.
cd Downloads
- Type
Get-FileHash iPhone3,1_7.1.2_11D257_Restore.ipsw -Algorithm SHA1
- The output of the command should match the following checksum:
81da17b3e893a61508fe203849b7e1f60e2127b1
. If it doesn't, you may need to redownload the file.
macOS
- Open a terminal, and navigate to the IPSW file that you downloaded, e.g.
cd ~/Downloads
- Type
openssl sha1 iPhone3,1_7.1.2_11D257_Restore.ipsw
- The output of the command should match the following checksum:
81da17b3e893a61508fe203849b7e1f60e2127b1
. If it doesn't, you may need to redownload the file.
Linux
- Open a terminal, and navigate to the IPSW file that you downloaded, e.g.
cd ~/Downloads
- Type
openssl sha1 iPhone3,1_7.1.2_11D257_Restore.ipsw
- The output of the command should match the following checksum:
81da17b3e893a61508fe203849b7e1f60e2127b1
. If it doesn't, you may need to redownload the file.
Checksums
SHA256sum |
8df4acce2cc2989ad159f980dd65a4bdc8c9eab4000e35169baa70ceb8749b2d |
MD5sum |
6ed6cb1c2eac7177f96c9fbcf04a4f34 |
SHA1sum |
81da17b3e893a61508fe203849b7e1f60e2127b1 |
Please note, the documentation below is supplied from Apple's update servers. We don't modify the contents of this documentation.
This update contains bug fixes and security updates, including:
- Improves iBeacon connectivity and stability
- Fixes a bug with data transfer for some 3rd party accessories, including bar code scanners
- Corrects an issue with data protection class of Mail attachments
For information on the security content of this update, please visit this website:
http://support.apple.com/kb/HT1222