iOS 4.3.5 for iPhone 3GS, iPhone 4 GSM, iPhone 4 CDMA, iPad, iPad 2, iPod Touch 3G and iPod Touch 4G has been released by Apple and is available for download. The new iOS 4.3.5 fixes some security issues that lead to the jailbreaking of iOS 4.3.4. The iOS4.3.5 jailbreak is not yet available on the Internet yet. So all those who want to jailbreak their iOS for using it may not upgrade their iOS. iOS 4.3.5 is recommended for all others.
Installing iOS 4.3.5 is very easy and can be done through iTunes. Just connect your device to your computer and start iTunes. It will automatically give you an update message about the new software available for download. You can press Download and Install button and the rest of the process is automatic.
If, for some reason, you want to download iOS 4.3.5 manually, you can download it from the locations given below: