Direct Download iOS 4.2.1 IPSW Files
Time to toy around with the iTunes as direct download links of the 4.2.1 firmware are here. All the Apple iPhone, iPod touch and iPad users can download 4.2.1 iOS either from the Apple website, or by clicking on the links given below.
You can download these IPSW files for your iPod touch (2G, 3G and 4G), iPhone (3G, 3GS and 4) and iPad (3G and Wi-Fi). As a word of caution, look at twitter or Facebook updates before upgrading.

Also, on the Apple discussion forum, couple of folks have pointed out minor issues after upgrading their iPhone to iOS 4.2.1. With that said, there are major improvements in this new iOS as well, especially for the iPad users.
Download iOS 4.2 For iPhone
Download iOS 4.2 For iPod touch
Download iOS 4.2 For iPad
Go ahead, and download the iOS 4.2.1 IPSW file. You can also update your device with this latest firmware by clicking on Update on your iTunes.

Related posts:
- How to install IPA files on iPhone, iPad and iPod touch
- Download iTunes 10 For Windows (32-bit and 64-bit Version) And Mac OS X (Direct download links)
- Latest iOS4.2 for iPhone, iPad And iPod touch is here! [Apple Developers Download iOS4.2 Beta]
- Download iOS4.0.2 Update For iPhone, iPod Touch
- Download Netflix For iPhone and iPod Touch From iTunes Store

i renamed the zip to ipsw and it still wont work
when itray to download ipsw 4.2.1 file I cant connect appldndld app. my questions how I can download ipsw file iphone 3g 4.2.1 thanks
ive tried renaming the file but it doesnt change anything
For some reason its not working for me. when it saves the file it saves it as a folder with a bunch of different stuff in it and not the actual ipsw file. What am i doing wrong?
i already download the ios 4.2.1 but i cannot find the ipsw file..i also cannot find the zip file like you post earlier. please help me
Why is it when I download the zip file. The IPSW file needed to plug into redsnow not there. I been having this problem with many sites. Am i missing something or going crazy? please respond
Windows for some reason saves the ipsw file with a zip extension. Simply rename the extension from “.zip” to “.ipsw” and you can then select it when you shift restore in iTunes.
it worked. thanks! i’ll try the JB now. fingers crossed.
What exactly am I supposed to rename? I renamed the Restore.plist, to Restore.ipsw successfully, but when I run redsn0w 0.9.6b2, it says that it does not recognize it. Please help!
don’t rename the plist file, rename the entire zip file
Leave the contents alone, don’t unzip… just rename
Thanks for posting these links!