iPhone 3gs won't update

[dpendarvis]

So a few months back, I downgraded my 3gs with redsn0w from 6.0 to 5.1.1. I decided to go back to 6.0 and for some reason it won't let me. I even tried to just upgrade to 6.0.1 but still no luck. Any clues?

 

[willerz2]

Hi, welcome to iPhoneForums. I'm Jon.

Please take some time to peruse the IPF Rules: iPhoneForums.net Forum Rules - Please Read and Respect our Rules

Here are some guides that may suit your needs.
iPhone Tips & Tricks | What is jailbreaking? | Thinking of Jailbreaking but are not sure |Can I Jailbreak my iPhone on this iOS/Jailbreak Status Thread

My particular field of expertise is iOS Jailbreaking and Unlocking.

What errors are you getting when trying to restore.

 

[dpendarvis]

Hi, welcome to iPhoneForums. I'm Jon.

Please take some time to peruse the IPF Rules: iPhoneForums.net Forum Rules - Please Read and Respect our Rules

Here are some guides that may suit your needs.
iPhone Tips & Tricks | What is jailbreaking? | Thinking of Jailbreaking but are not sure |Can I Jailbreak my iPhone on this iOS/Jailbreak Status Thread

My particular field of expertise is iOS Jailbreaking and Unlocking.

What errors are you getting when trying to restore.

It says my phone is not supported for the update, no matter which ipsw I try. I've tried 6 and 6.0.1

 

[dpendarvis]

the exact error is "The iPhone could not be restored. An unknown error has occurred (1601).

 

[dpendarvis]

I also just tried it again and now I got error 21. Any ideas on how I could restore/update?

 

[willerz2]

Reinstall the drivers for your device and try a different USB port.