I get an error message while trying tu upgrade iPhone4

Question

Hi,
I have bought an used iPhone (not new but sill under warranty), and when I try tu upgrade firmware through itunes (from 4.3 to 4.3.3) I get this message "This device is't eligible for the requested build"
What can I do to get this last firmware ?
Thanks

Answer 1

Problem might be on you Mac, you need to edit your hosts file and remove any mention to gs.apple.com.
Editing the hosts file
Editing the hosts file in Mac OS X – Leopard, is a pretty easy task, especially if you are familiar with the terminal.
Step 1 – Open the Terminal.app
Either by start typing Terminal on the Spotlight, or by going into Applications -> Utilities -> Terminal.
Step 2 – Open the hosts file
Open the hosts by typing on the Terminal that you have just opened:
1
$ sudo nano /private/etc/hosts
Type your user password when prompted.
Step 3 – Edit the hosts file
The hosts file contains some comments (lines starting with the # symbol), as well as some default hostname mappings (e.g. 127.0.0.1 – localhost).
You can navigate the file using the arrow keys.
Step 4 – Save the hosts file
When done editing the hosts file, press control-o to save the file.
Press enter on the filename prompt, and control-x to exit the editor.
Step 5 – Flush the DNS cache
On Leopard you can issue a simple Terminal command to flush the DNS cache, and have your host file changes to take immediate effect:
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$ dscacheutil -flushcache
You can retry your upgrade...