Preventing Baseband Update

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Reason: I tried this without success, see talk page. This page here should either be enhanced with other methods, or someone should confirm that it works and that I made a mistake. Nobody has confirmed this as working yet. If you disagree with the reason for deletion, please discuss this deletion request this page's talk page.

1. Unpack Original/Custom IPSW
2. Decrypt Restore Ramdisk using xpwntool and mount it
3. Navigate to /usr/local/share/restore
4. Edit options.plist on the restore ramdisk

<?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>CreateFilesystemPartitions</key>
	<true/>
	<key>SystemPartitionSize</key>
	<integer>1024</integer>
	<key>UpdateBaseband</key>
	<false/>
   	<key>SystemImage</key>
   	<true/>
</dict>
</plist>

5. Reencrypt the restore ramdisk
6. Repack the IPSW
7. Restore IPSW to iTunes after preparing device for custom firmware.

This method works on iOS 4.2.1