iOS 4.3.4 Summary
Version 4.3.4 of Apple’s iOS for iPhone, iPad and iPod Touch was released on 15th July 2011.
Downloading & Installing iOS 4.3.4
For most normal users it is advisable to install iOS 4.3.4 using the normal method of plugging in your device and hitting ‘Download & Install’ button when prompted by iTunes.
There are however other ways including downloading the full software package (links below) in IPSW format.
You can learn the various ways of updating your iOS device’s software in this tip.
Download IPSW Files