November 15th, 2011 by shaikhzaid under
iPhone
Currently untethered jailbreak to iPhone 4, 3GS, iPod Touch 4G, 3G is not available, Dev team and Chronic Dev team are working hard to come up with iOS5 untethered jailbreak. However, BigBoss announced about iOS5 semi untethered jailbreak. It is worth to describe what does Semi Tethered or Semi Untethered means.

What is Tethered JailBreak?
This type of JailBreak require a computer connection to boot a jailbroken iDevice. i.e. every time your iDevice reboots or the battery dies, you have to connect (tether) your iOS device back to your computer and boot it through the jailbreak application
What is Untethered Jailbreak ?
This is the preferred and widely used Jailbreak. No computer connection is required to boot your device, even if your battery dies. You just need to recharge your iDevice and your device boots up.
What is Semi Tethered jailbreak?
Semi Tethered jailbreak is a way to boot your device in emergency or your device reboots while you were away from your computer. Note that, most of the jailbreak apps and tweaks will not work if booted semi tethered, but you’ll be able to use most important features of your iDevice until you connect to a computer and reboot with RedSn0w.
Semi-tethered jailbreak iOS 5 Supported Devices :
- iPhone 4
- iPhone 3GS
- iPhone 3GS New Bootrom
- iPad 1
- iPod Touch 4G
- iPod Touch 3G
Semi-tethered jailbreak iOS 5 Un-Supported Devices:
Working Functions in Semi- Tethered Jailbreak
- Phone, SMS
- Atomic web browser
- Stock app on iPhone.
Not Working functions in Tethered Jailbreak
- Mobile Safari
- Mail App
- Any jailbreak tweak, app, cydia until you boot tethered.
- Do not add a jailbreak iOS5 notification while your iDevice is in semitether booted state or your device will be stuck in a respring loop until you boot tethered.
Step by Step guide to install SemiTether tool
Step 1:You must install iOS 5 on you device and tethered jailbreak it
Step 2: Now, open Cydia > Manage > Sources.
Step 3: Tap on Edit > Add and insert the below mentioned repository
http://thebigboss.org/semitether
Step 4: Search for SemiTether and install it then reboot your device.
Step 5: Now, if needed, you should be able to boot your iDevice in emergency or without a computer connection.