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Difference between revisions of "Preventing Baseband Update"
m (WHY SO LARGE?) |
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| − | =Step 1: Swap Ramdisks= |
+ | ==Step 1: Swap Ramdisks== |
| − | Open the IPSW |
+ | Open the IPSW (with your favorite ZIP utility). Replace the [[Restore Ramdisk]] and the [[Update Ramdisk]] names with each other. |
| − | <br>This is done to bypass [[baseband]] check |
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| − | = Step 2: Edit options.plist = |
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| + | == Step 2: Edit options.plist == |
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| − | # Unpack Custom IPSW |
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| + | # Unpack custom IPSW |
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# Decrypt Restore Ramdisk using [[xpwntool]] and mount it |
# Decrypt Restore Ramdisk using [[xpwntool]] and mount it |
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# Navigate to /usr/local/share/restore |
# Navigate to /usr/local/share/restore |
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| Line 24: | Line 23: | ||
<li>Reencrypt the restore ramdisk</li> |
<li>Reencrypt the restore ramdisk</li> |
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<li>Repack the IPSW</li> |
<li>Repack the IPSW</li> |
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| − | <li>Prepare device for custom firmware using [[redsn0w]] |
+ | <li>Prepare device for custom firmware using [[redsn0w]]</li> |
<li>Restore IPSW to [[iTunes]] in pwned [[DFU Mode]]</li> |
<li>Restore IPSW to [[iTunes]] in pwned [[DFU Mode]]</li> |
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</ol> |
</ol> |
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| + | You must load a patched [[iBSS]]/[[iBEC]] for this to work. Using an original IPSW will not work, because redsn0w's pwned DFU Mode doesn't patch sigchecks in [[iBSS]]. |
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| − | This won't work with original IPSW. Pwned DFU mode doesn't patch sigchecks in [[iBSS]], so the [[Restore/Update Ramdisks|ramdisk]] won't load. You need to load patched [[iBSS]]/[[iBEC]] for this to work. |
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| − | =[[TinyUmbrella]]/[[Cydia]] Method for iPhone 4 (Doesnt work on iOS 4.2.1)= |
+ | ==[[TinyUmbrella]]/[[Cydia]] Method for iPhone 4 (Doesnt work on iOS 4.2.1)== |
| − | The [[N90ap|iPhone 4]] |
+ | The [[N90ap|iPhone 4]] requires a signature from Apple in order to update the baseband. Pointing the hosts file to [[Saurik]]'s server or running [[TinyUmbrella]] will allow this request for signature to be ignored, thus preventing a [[baseband]] update. |
'''Warning : This might only work if [[Cydia]]/[[TinyUmbrella]] accepts the latest firmware SHSH''' |
'''Warning : This might only work if [[Cydia]]/[[TinyUmbrella]] accepts the latest firmware SHSH''' |
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| − | # Edit the hosts file and add the line "74.208.10.249 gs.apple.com" without the quotes or run [[TinyUmbrella]] after saving the |
+ | # Edit the hosts file and add the line "74.208.10.249 gs.apple.com" without the quotes, or run [[TinyUmbrella]] after saving the firmware's SHSH |
| − | # Use the |
+ | # Use the "Restore" button in [[iTunes]] to update. |
'''Custom [[Firmware]] wont work with [[TinyUmbrella]]/[[Cydia]] Method''' |
'''Custom [[Firmware]] wont work with [[TinyUmbrella]]/[[Cydia]] Method''' |
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Revision as of 03:44, 9 December 2010
Step 1: Swap Ramdisks
Open the IPSW (with your favorite ZIP utility). Replace the Restore Ramdisk and the Update Ramdisk names with each other.
Step 2: Edit options.plist
- Unpack custom IPSW
- Decrypt Restore Ramdisk using xpwntool and mount it
- Navigate to /usr/local/share/restore
- Edit options.plist on the restore ramdisk
(Ignore the SystemPartitionSize in your plist file and leave it)
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
<key>UpdateBaseband</key>
<false/>
</dict>
</plist>
- Reencrypt the restore ramdisk
- Repack the IPSW
- Prepare device for custom firmware using redsn0w
- Restore IPSW to iTunes in pwned DFU Mode
You must load a patched iBSS/iBEC for this to work. Using an original IPSW will not work, because redsn0w's pwned DFU Mode doesn't patch sigchecks in iBSS.
TinyUmbrella/Cydia Method for iPhone 4 (Doesnt work on iOS 4.2.1)
The iPhone 4 requires a signature from Apple in order to update the baseband. Pointing the hosts file to Saurik's server or running TinyUmbrella will allow this request for signature to be ignored, thus preventing a baseband update.
Warning : This might only work if Cydia/TinyUmbrella accepts the latest firmware SHSH
- Edit the hosts file and add the line "74.208.10.249 gs.apple.com" without the quotes, or run TinyUmbrella after saving the firmware's SHSH
- Use the "Restore" button in iTunes to update.
Custom Firmware wont work with TinyUmbrella/Cydia Method
