IPhone 3G restoration and jailbreak tutorial

Recently, a US version of the iPhone 3G mobile phone showed white apple, unlimited chrysanthemum, and unlimited restart (this status is really crazy ). After several hours of trying, I finally recovered and saved the iPhone. The following is my procedure:
 
Preparations:
Red Snow redsn0w 0.9.3 Latest Version
IPhone 3.1.2 firmware
IPhone 3.1.3 firmware

Procedure:
1. in iTunes, first press the Shift key on the keyboard, then click "check for updates" or "Restore", select the latest 3.1.3 firmware that has been downloaded to the local device, and upgrade or refresh the firmware.
2. After the restoration is complete, open the latest version of Red Snow redsn0w 0.9.3.
3. Enter the welcome screen! Click the Browse button to select the 3.1.2 firmware (remember 3.1.2 instead of 3.1.3 ). As expected, the program displays "ipsw successfully identified" and the firmware is successfully identified.
4. Select the first install cydia (install cydia ).
5. Follow the red and snow prompts to perform the jailbreak operation.
6. the jailbreak is successful. Connect to iTunes and display the phone number and firmware version 3.1.3.

Note:

The "Unknown error 1015" window appears during the flash process. Keep this error window uncertain, and keep iTunes open. At this time, the "USB + iTunes" figure appears on the mobile phone screen. Use umbrella-4.1.6 and click "Kick device out of recovery ".

By sschu 2011-8-16 18:54:49