Problem updating iphone 3gs software

 The chances are you’ve arrived here after a Google search having had similar problems – hopefully we can help you out too!

It was succeeded as Apple's flagship smartphone in 2010 by the i Phone 4; however, the 3GS continued in production until September 2012 when the i Phone 5 was announced.So naturally, all the signing is already done with so if you're trying to downgrade to i OS 7.x an upgrade to i OS 8, you're going to have a bad time (unless you're lucky and you downgraded within the short time window where Apple still signs).And when you're dealing with a jailbroken i Phone, it's going to be even worse.This guide assumes that the computer you are going to use is connected to the Internet and is NOT behind a proxy server (for example, isn’t your work PC). There are known problems with i Tunes being able to communicate with Apple’s authentication servers from behind firewalls.Hopefully the above steps will help you out of your situation. If not, please feel free to ask in our comments section below and we’ll attempt to offer advice; however whilst researching our colleagues problem, we did come across a large number of people who have experienced upgrade errors and have had to get their device swapped out by Apple, who have done so in many cases without even attempting to restore problematic devices themselves since they have allegedly seen so many of them!If you're real lucky – and I mean seriously lucky – you'll not see any errors crop up when you try to update or restore.Most users who don't usually tinker with their i Phones are these lucky ones.Apple's support page for specific errors on i Tunes isn't all that helpful.For starters, Apple isn't all that interested in people downgrading their i OS firmware.Most of the errors can be found at Apple's Knowledge Base. This happens if you edited the hosts file (Saurik's Server) or you are using Tiny Umbrella.Here is a list of i Tunes errors that could appear during a restore or a USB connection via i Tunes: This error happens if you are logged out, try to download something from the i Tunes Store and if you click on "Download" and enter an account, which doesn't have this article, this error will occur. Use Tiny Umbrella and "Kick Device Out Of Recovery" to boot.