However, to note that this tutorial does not apply to downgrade the iOS 5 firmware (9A334) on iPad 2 3G, because now you can not downgrade its baseband, if you have upgraded iPad 2 3G to iOS 5, it can only say pity.
Downgrade Steps:
Step 1: Download the corresponding IPSW firmware file for your device:
Download iOS 4.3.3
| AppleTV(2G) (AppleTV2,1) | 4.2.1 (8F202) | 03/22/2011 16:12:01 |
| iPad (iPad1,1) | 4.3.3 (8J3) | 05/04/2011 13:19:01 |
| iPad 2,1 (iPad2,1) Wifi | 4.3.3 (8J2) | 05/04/2011 13:19:01 |
| iPad 2,2 (iPad2,2) GSM 3G | 4.3.3 (8J2) | 05/04/2011 13:19:01 |
| iPad 2,3 (iPad2,3) CDMA 3G | 4.3.3 (8J2) | 05/04/2011 13:19:01 |
| iPhone (iPhone1,1) | 3.1.3 (7E18) | 04/08/2010 21:05:48 |
| iPhone 3G (iPhone1,2) | 4.2 (8C148) | 11/22/2010 13:08:57 |
| iPhone 3GS (iPhone2,1) | 4.3.3 (8J2) | 05/04/2011 13:19:01 |
| iPhone 4 (iPhone3,1) | 4.3.3 (8J2) | 05/04/2011 13:19:01 |
| iPhone 4 (vz) (iPhone3,3) | 4.2.8 (8E401) | 05/04/2011 13:19:01 |
| iPod Touch (2G) (iPod2,1) | 4.2 (8C148) | 11/22/2010 13:08:57 |
| iPod Touch (3G) (iPod3,1) | 4.3.3 (8J2) | 05/04/2011 13:19:01 |
| iPod Touch (4G) (iPod4,1) | 4.3.3 (8J2) | 05/04/2011 13:19:01 |
| last updated: 05/04/2011 13:20:01 EDT | ||
|---|---|---|
Download iOS 4.3.2
| AppleTV (2G) (AppleTV2,1) | 4.2.1 (8F202) | 03/22/2011 16:12:01 |
| iPad (iPad1,1) | 4.3.2 (8H7) | 04/14/2011 13:06:02 |
| iPad 2,1 (iPad2,1) | 4.3.2 (8H7) | 04/14/2011 13:06:02 |
| iPad 2,2 (iPad2,2) | 4.3.2 (8H7) | 04/14/2011 13:06:02 |
| iPad 2,3 (iPad2,3) | 4.3.2 (8H8) | 04/14/2011 13:06:02 |
| iPhone (iPhone1,1) | 3.1.3 (7E18) | 04/08/2010 21:05:48 |
| iPhone 3G (iPhone1,2) | 4.2 (8C148) | 11/22/2010 13:08:57 |
| iPhone 3GS (iPhone2,1) | 4.3.2 (8H7) | 04/14/2011 13:06:02 |
| iPhone 4 (iPhone3,1) | 4.3.2 (8H7) | 04/14/2011 13:06:02 |
| iPhone 4 (vz) (iPhone3,3) | 4.2.7 (8E303) | 04/14/2011 13:06:02 |
| iPod Touch (2G) (iPod2,1) | 4.2 (8C148) | 11/22/2010 13:08:57 |
| iPod Touch (3G) (iPod3,1) | 4.3.2 (8H7) | 04/14/2011 13:06:02 |
| iPod Touch (4G) (iPod4,1) | 4.3.2 (8H7) | 04/14/2011 13:06:02 |
Download iOS 4.3.1
- iPhone 4 （GSM）：iPhone3,1_4.3.1_8G4_Restore.ipsw
- iPhone 3GS：iPhone2,1_4.3.1_8G4_Restore.ipsw
- iPad 2 Wi-Fi：iPad2,1_4.3.1_8G4_Restore.ipsw
- iPad 2 GSM：iPad2,2_4.3.1_8G4_Restore.ipsw
- iPad 2 CDMA：iPad2,3_4.3.1_8G4_Restore.ipsw
- iPad：iPad1,1_4.3.1_8G4_Restore.ipsw
- iPod touch 4：iPod4,1_4.3.1_8G4_Restore.ipsw
- iPod touch 3：iPod3,1_4.3.1_8G4_Restore.ipsw
- iPhone 4 iOS 43
- iPhone 4 Verizon CDMA iOS 4.2.6
- iPhone 3GS iOS 4.3
- iPod touch 4G iOS 4.3
- iPod touch 3G iOS 4.3
- iPad 1 iOS 4.3
- iPad2,1 iOS 4.3（WiFi）
- iPad2,2 iOS 4.3（GSM）
- iPad2,3 iOS 4.3（CDMA）
- Apple TV 2
Step 2: Make your iPhone, iPad, or iPod touch into DFU mode after the firmware downloaded.
Step 3: This is an important step, you need to cheat iTunes. By manually guide Apple points to Saurik server. As follows:
Windows users use Notepad to open C:\Windows\System32\drivers\etc\hosts file (Windows 7 and Vista requires administrator privileges, you can directly use the right -> run as administrator)
Mac users /etc/hosts (can use the Finder to find)
Adding 74.208.105.171 gs.apple.com this line at the end of the Hosts file
save it.
Step 4: Open iTunes, hold down the computer keyboard Shift (Windows) or the left alt key (Mac) and click restore, do not click any other button! A new window will pop up and prompt to load IPSW file.
At this point, you need select the downgraded IPSW firmware (iOS 4.3.3, 4.3.2, 4.3.1, 4.3 or 4.2.1) , click Open. iTunes will complete the next work.
please do not disconnect the data cable until the device restarts automatically, not close iTunes, and not to do other meaningless operation.
Sometimes iTunes will prompt an error 1013, please ignore it, which often appears in the jailbreak process, do not panic. When the firmware downgrade is completed, your device most will enter the recovery mode.
Step 5: you can use TinyUmbrella, or Fix Recovery to jump out the recovery mode. You only need to openTinyUmbrella and click “Exit Recovery”, then everything is normal after a few seconds to reboot. (iTunes must to keep open).
Finally, add the # sign in front of 74.208.105.171 gs.apple.com to comment out, to ensure you can normally use Apple’s other services.
You can also jailbreak your device untethered.
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