Normally, iTunes does not let you install any cracked applications that you do not purchase from iTunes store, even though your iPhone/iPod touch/iPad has already been jail-broken.
 So if you want to install any cracked application into your jail-broken iPhone/iPod touch/iPad via iTunes, please follow the undermentioned instruction.
  - Run Cydia from the springboard
- Go to Manage tape
 - Click on Sources
 - Click Edit and then Click Add
 - Enter the source: http://www.sinfuliphonerepo.com/ or http://cydia.hackulo.us/
 - Click Add Source
 - Click Done
 - After that, search for: AppSync for OS… (base on current version of your 
   iphone/iPod touch e.g. 3.0, 3.1.x or 4.x)
 - Then, Install it 
 Now you can install or sync any cracked application via iTunes successfully.
 Let’s enjoy it.
   



















 


