A semi-tethered jailbreak is an interim solution which solves the problem of being unable to reboot with a tethered jailbreak. The semi tethered jailbreak by BigBoss will allow you to reboot on the road, but with limited functionality. It is enough that you are no longer stranded, and you can use your phone, text, and many other features. This is just until you get home and can use redsn0w again to just boot tethered. Once you do that, youre back to fully functional state.
Jailbreak and boot your device tethered using the instructions below:
● iPhone 4 (Mac, Windows)
● iPhone 3GS (Mac, Windows)
● iPhone - No Baseband Update (Mac)
● iPod Touch 4G (Mac, Windows)
● iPod Touch 3G (Mac, Windows)
● iPad 1 (Mac, Windows)
Press to launch Cydia from your Springboard.
Press to select Manage from the tabs at the bottom of the screen.
Press the large Sources button.
Press the Edit button at the top right of the screen.
Press the Add button at the top left of the screen.
Input http://thebigboss.org/semitether into the text field and press the Add Source button.
Press the large Return to Cydia button.
Select thebigboss.org from the list of Sources
Select SemiTether from the list of Packages
Press the Install button at the top right of the screen.
Press the Confirm button to begin installation.
Press the large Reboot Device button.
You're device will now reboot without stalling at the Apple logo!
To get full functionality back you will need to boot tethered. Launch RedSn0w as you did in Step One then select Extras then Just boot from the menu.
**A big thanks to BigBoss and all those who made this tutorial possible.