AppSync, the app used to install .ipa files manually, has been updated to a newer version for the iOS 4.1 firmware running devices. How to Install AppSync 4.1 on iOS 4.1All those who have been able to jailbreak their devices and obtain cydia on their iPhone or iPod Touch on iOS 4.1 can install AppSync 4.1. Here are the instructions to install AppSync 4.1 on iOS 4.1.

1. Jailbreak your iPhone or iPod Touch on iOS 4.1.

Jailbreak iPhone 3GS on iOS 4.1

Jailbreak iPhone 3G on iOS 4.1

2. Launch Cydia.

3. Select the ” Manage ” tab.

4. Tap on ” Sources “.

5. Add the source “ http://cydia.hackulo.us  “.

6. When the source is added, search for ” AppSync for OS 4.1 ” in Cydia.

How to Install AppSync 4.1 on iOS 4.1

7. Install the AppSync for iOS 4.1.

That’s it! You have successfully installed AppSync on iOS 4.1.