How to fix MobileSubstrate

iOS 4.3 breaks the MobileSubstrate in Cydia after jailbreak. It’s due to the ASLR (Address Space Layout Randomization) implementation in iOS 4.3. Mobile Substrate is an essential base for all the tweaks and hacks available in Cydia.

Saurik has silently updated Mobile Substrate for iOS 4.3 jailbreak. These are the instructions to fix for Mobile Substrate in Cydia after iOS 4.3 jailbreak on iPhone, iPad and iPod touch. Once done! you can install Cydia apps and tweaks of your choice.

Fix MobileSubstrate on iOS 4.3 after Jailbreak

We assume that your iPhone, iPad, iPod Touch is already jailbroken on iOS 4.3. If not, follow the guide linked below to jailbreak iOS 4.3 on iPhone 4, 3GS, iPod Touch 4G, 3G and iPad 1:
How to: Jailbreak iOS 4.3 with Sn0wBreeze

Direct Download Links from Apple for iOS 4.3

• iPhone 4 (GSM)
• iPhone 3GS
• iPad 2
• iPad
• iPod touch 3G
• iPod touch 4G
• Download iTunes 10.2.1 for Windows and Mac

Step 1: Download this .deb file.

Step 2: SSH into iPhone, iPod Touch or SSH into iPad

Step 3: Navigate to /var/root/Media/

and create a new folder named Cydia and inside Cydia folder, create a folder called AutoInstall (Folder names are Case-Sensitive)

Step 4: Now copy the downloaded .deb file inside the AutoInstall folder and reboot your iDevice.

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