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Faux Carnival

macrumors 6502a
Original poster
Aug 1, 2010
697
2
Hello, I have an iPhone 3G. I want to roll back to 3.1.3. I found a custom firmware and put the device in DFU mode. And shift click Restore.

I just can't get it to restore. It gives 16xx errors. (1604) I tried with different computers (PC and Mac) and with different USB cables.

Any help is appreciated.
 
Hello, I have an iPhone 3G. I want to roll back to 3.1.3. I found a custom firmware and put the device in DFU mode. And shift click Restore.

I just can't get it to restore. It gives 16xx errors. (1604) I tried with different computers (PC and Mac) and with different USB cables.

Any help is appreciated.

Why do you need a customs 3.1.3 to roll back? just restore it to stock 3.1.3 and it works fine.

Put your phone into DFU mode, hit shift + restor (PC) or Option + restore (Mac) and point it to stock 3.1.3 to restore. At the end, you will get 1015 error. Use TU, Ireb etc.. to exit recovery. Your phone will boot up normally and you will have a 3G with 3.1.3 firmware.
 
My device is locked to a specific carrier. I did what you said. Now I'm at the "Connect to iTunes to unlock." screen. How do I unlock my device now?

Thanks.
 
My device is locked to a specific carrier. I did what you said. Now I'm at the "Connect to iTunes to unlock." screen. How do I unlock my device now?

Thanks.

put in the sim for that carrier, hook it to Itunes and it will pass that screen.

If you don't have that sim, the hactivate it with Redsn0w and it will by pass that screen as well.
 
It says "Can't do that for your iPhone 3G" or something like this... I'm about to go crazy. :confused:
 
What is your ultimate goal on this?

Jailbreak & unlock this phone so you can use it with other sim?

What redsn0w version are you using to hactivate this phone now?

Exactly. It is an unlocked phone from another country. I'm using 0.9.6rc16 at the moment.
 
Exactly. It is an unlocked phone from another country. I'm using 0.9.6rc16 at the moment.

You did not say clearly what you want on the opening thread.

Anyway, I have few more question.

1. Do you know if this phone is factory unlock?
2. If not, my concern that if the baseband on your phone is higher than 05.13, you still can unlock it with Ultrasn0w.

Anyway, follow this tutorial to jailbreak/hactivate your phone first, then we can check your baseband and will advise you the next step.

http://iclarified.com/entry/index.php?enid=7443

PS. the redsn0w version you are using is too new for 3.1.3.
 
Thank you so much everyone! Finally, I got it working... I'll check my baseband now and attempt a regular ultrasn0w unlock. I hope, my baseband didn't get upgraded in the process.

Cheers.
 
Done it guys! Finally... Oh it was a nightmare. Let me summarize the process for people who might need it in the future.

Going back to 3.1.3 from 4 on SIM-locked iPhone 3G:

1) Put the device in DFU mode and shift-restore with an unmodified 3.1.3 firmware. (ipsw can be found on iClarified)
2) Kick the device out of restore with RecBoot.
3) Jailbreak with redsnow 0.9.3. (This is important. I tried with the latest version and it didn't work.)(Another important thing is, redsnow won't recognize 3.1.3 firmware. Just point it to a 3.1.2 firmware. It doesn't matter. Even if you are on 3.1.3. redsnow works the same with the 2 versions. The 3.1.2 ipsw file can also be found on iClarified)
4) Go to Cydia and add the repo: repo666.ultrasn0w.com. Find ultrasn0w and install it. You are done.

Do not try a blacksn0w unlock!! It is so painful and slow and doesn't work. IF ultrasn0w doesn't work for you, add the repo blackra1n.com and then try blacksn0w unlock.

Have a good day everyone. I'm so glad I got rid of the iOS 4 joke. (At least on my 3G. :D)
 
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