The iPhone Software server could not be contacted

My friend just sold me his iPhone 3GS since he is buying a new one. He says that I need to update the OS version of the phone to iOS 6.0 by using iTunes.

I downloaded iTunes and tried to update it but it now says the error:

/quote

The iPhone Software server could not be contacted.

Make sure your network settings are correct and your network connection is active, or try again later.

/unquote

I have read some existing queries regarding the above error and I have did some of the workarounds mentioned but it is still not solved. My network settings are updated, network carrier is correct even the ICCID displayed is not blank.

Below are the data when my 3GS is connected in iTunes:

Name: iPhone

Capacity: 14.28 GB

Software Version: 4.3.2

In phone settings

ICCID: 8963 0313 3180 7298 4798

Carrier: SMART

BTW im from the Philippines