The iPhone dev team has updated its Redsn0w jailbreak tool to support jailbreak for iOS 5.1 devices. Of course, it only supports A4 devices (iPhone 3gs, iphone 4, iPad and iPod touch) and cannot jailbreak iPhone 4S or iPad 2. In addition, the jailbreak is not a perfect jailbreak, And the reboot requires guidance. You can also use "SemiTether" for semi-perfect jailbreak. The following is a tutorial guide to redsnow 0.9.10b6 not perfectly jailbreak iOS 5.1.
Although it is not a perfect jailbreak, it is worthwhile to use idevices without restriction. The following is a tutorial!
Note:
This jailbreak is not a perfect jailbreak. Every time you restart or shut down the system, you must start the system again. Otherwise, you cannot start the system.
Jailbreak tutorial
Step 2:Download the latest version of iTunes (Latest Version: 10.6)
Step 2:Open iTunes and connect to your device.
Step 2:Upgrade to iOS 5.1. [IOS 5.1 official firmware download link]
Step 2: Download the latest version of Redsn0w (redsnow 0.9.10b6 download link), of course, you can also use snowbreeze 2.9.2 for jailbreak (download)
Step 2:Start Redsn0w, select "Jailbreak", and then select "Install Cydia )".
"> Follow the software prompts to switch your device to DFU mode.
Step 2:Now we have completed jailbreak and need to restart the device. Follow these steps to boot the system: Start Redsn0w, select "Extras", and then click "Just boot" to boot the system.
">
Semi-perfect jailbreak start (optional)
"> The" SemiTether "patch supports ios 5.1. You do not need to boot, but there are limits on the available functions after startup, and many basic functions will become unavailable. Therefore, use it with caution. (We recommend that you do not use Redsn0w for semi-perfect jailbreak ). To install the SDK, add the following source and install it: http://thebigboss.org/semitether.
Note:
"> If you use gevey sim card plug or Ultrasn0w to unlock, you need to create a self-made IPSW firmware that retains the baseband. The procedure is as follows:
Start Redsn0w, select "Extras", click "Custom IPSW", and select the official IOS 5.1 firmware to be downloaded. The Redsn0w software will automatically create a self-made firmware.
"> After the preparation, start redsnow to enable the device to enter the DFU mode (Extras> Pwned DFU. If you are familiar with the dfu operation procedure, you can also manually operate the device to enter the dfu mode ), enable itunes and restore your own firmware. In this way, you may use GEVEY or Ultrasn0w for unlocking (of course, you need GEVEY or Ultrasn0w for unlocking ).
