break jail
Step 1: Open RedSn0w
Step 2: When RedSn0w opens normally, click the browse button and select the downloaded official firmware in the pop-up dialog box.
Step 3: Click "Next" to continue, and then you will see that RedSn0w is preparing the jailbreak data, waiting for the progress bar to be completed.
Step 4: Check "Install Cydia" and click "Next"
Step 5: Follow the prompts to turn off the iPhone and keep the connection with the computer, and then click Next to continue.
Step 6: Enter DFU mode. Press and hold the power button (power on) at the top, and there will be a digital display. After about three seconds, press and hold the power button, and then press and hold the Home key.
Step 7: When the power button and the Home button are pressed at the same time, the power button can be released after about 10 second (mostly less than 10 second), but the Home button still cannot be released.
Step 8: After about 30 seconds, you can release the Home button. At this time, RedSn0w will start uploading and repairing the iPhone. This process must not be interrupted.
Step 9: Wait for RedSn0w to start uploading new RAM and kernel. In this process, the iPhone will go blank, and then the code will jump to the screen. Just wait patiently.
Step 10: iPhone jailbreak is completed. Click Finish to wait for the iPhone to restart.
After the iPhone restarts and enters the main page, open cydia. It should be noted here that when cydia is opened for the first time, Cydia will automatically move files and other operations. Please do not interrupt forcibly to avoid losing its function, and the iPhone will not restart until the "chrysanthemum" at the bottom of the screen disappears. In addition, you can also set automatic locking in iPhone- General-and change the automatic locking to "Never" to avoid the interruption of cydia file movement caused by screen locking.
When the files on cydia are moved, the iPhone will automatically log off, and nothing will be done to the iPhone during this process. After logging out, when you re-enter Cydia, you can load data faster by selecting "User" as your identity. At this point, the iPhone 3GS jailbreak is finally completed! !