Troubles downloading the update for iphone

Question

When I try to download the update, it goes fine until 95% then it stops. The error message is something about lost connection, but there's no lost connection. And the firewall doesn't stop it either. I need to update it because I bought some apps, that doesn't work properly without the update. I checked if itunes was in the exception list, so the antivirus doesn't stop it, and it is. Any clues? Do you think it would download properly by cable instead of wireless internet?
I downloaded some other stuff on the computer and it doesn't stop..

Answer 1

Hi,
If you're having problems downloading iOS 4.2.1, and get an 3259 error, try this:
For a 3GS, download the iOS 4.2.1 IPSW package
http://appldnld.apple.com/iPhone4/061-9895.20101122.Cdew2/iPhone2,14.2.1_8C148aRestore.ipsw
It's better to use a download manager, like Free Download Manager, GetRight, etc.
Once you have the file in your PC, open iTunes and connect the iPhone.
Now, hold the Shift key on your PC keyboard and click on Update.
A file dialog will appear. Locate the IPSW file you downloaded and follow the regular update instructions.
I hope this solves your problem.
Cheers.