This one is just for iPhone 3GS and have his offficielle UDID SIM Card a developer account.
It is strongly advised to have his record shsh signed for iOS 4.0 or 4.0.1 for your ECID Cydia on the server for a restore to 4.0 or 4.0.1 in the future.
- IPhone 3GS former iBoot.
- The best condition to be restored is already jailbroken iOS to restore this custom.
- The sub jailbroken 3.1.3 with Spirit, must install the package Spirit2pwn
- ITunes 9.2.1 or 9.2
- Place your iPhone to Recovry and not DFU.
- Launch iTunes detects a device in recovery mode.
- Press SHIFT (ALT mac) + Restore.
- An explorer window opens.
- Install OpenSSH from Cydia as software requires connection as SSH or Winscp iTunnel.
- Go to usr / libexec
- Save and replace the file installdir, which is included in the file (equivalent to Appsync)
- Then put the permission on the file 0755.
- Ultrasn0w not compatible iOS 4.1, you must have a SIM card official!
It is his UDID-half hours, a Dev account to enable this custom iOS 4.1.