Originally Posted by cloud75

Tried that also using both ibrickr og iliberty to get me into DFU still error 20.

I also tried Mac now and same result

DUDE where were you 2 nights ago.....i was going crazy with the 20 message......
thanks for the info
thats what drives everybody crazy dfu and restore 2 different things........ i did know the difference
thanks again

check baseband. when i was downgrading from iphone 2.0 beta 4 i ran into a lot of errors. Try the patched version of ZiPhone to downgrade your baseband. Ziphone Patched
Do not use ierase
also try using an earlier version of itunes, such as 7.5

if not just try googling downgrade from 2.0

worked for me.

Edit
Try http://www.iclarified.com/entry/index.php?enid=1504
I heard a lot of people benefit from this

Originally Posted by addario

Hi there...

I've got the same until I realise that many people, including me, mistake "Restore Mode" for "DFU Mode".

If you are getting error 20 (Version you are trying to load is older than the one you already have) check if you are really on DFU.

A lot of people seem to think that DFU mod and Recovery mode on the iPhone are the same. Apart from the blank screen in DFU mode and the iTunes/Dock Cable logo this is another, greater difference.

When you put your phone in Recovery mode the iPhone still loads up a mac "OS" if you will. Whereas in DFU mode the iPhone does not load up the OS. This means that communication between the iPhone and iTunes in DFU mode is minimal - therefore iTunes will not randomly decide to interrupt you while downgrading firmware etc.

To put your phone in recovery mode simply:

1. Switch off the iPhone.
2. Hold the home button as you connect your iPhone to your PC/Mac.
3. Continue to hold the home button untill you see the iTunes/Dock Cable logo.


To put your iPhone in to DFU mode:

1. Turn on iPhone
2. Connect to PC/Mac
3. Open iTunes
4. Hold down power and home buttons
5. Wait untill red slider appears to shut down iPhone - keep holding the buttons.
6.Wait untill the iPhone shuts down
7. Release power button, keep home button pressed (if the Apple logo appeared you didn't release the power button quick enough - try again!)
8. Wait about 7 seconds - iTunes should say there is an iPhone connected in "restore mode"

Tried that......still get the Error (20)

iTunes 7.5 does say that "there is an iPhone connected in :Recovery Mode"

I then Hold the <Shift> key and click Restore, open the 1.1.4 firmware.

The file extracts and the next screen gives me .....Unexpected Error (20).

I have tried this close to 100 times in the last 2 days and I keep getting the Unexpected Error (20).

When I try restoring the 1,1_2.0 Firmware. It works fine. No errors at all and I get the iTunes to ask me to Activate the iPhone (using iTunes 7.7).

Then I placed the Phone n DFU Mode again, used iTunes 7.5 and tried loadin firmware 1.1.4 again and again to keep getting the Error (20).

Is there anyone that has been able to down grade to 1.1.4 when you were getting the Error (20)? Not error 10** or Error 16** or any other error. Error (20)

This is becoming very frustrating.

Yep... I did... I was getting error 20 until I remembered that the damn DFU mode and Recovery Mode are two very different things... on DFU mode you should have your iPhone with a black screen and nothing else, no "connect to iTunes" showing on the phone's screen, no graphics, no nothing... just a black screen. If you get that working it *WILL* restore back to 1.1.4 on iTunes 7.5... guaranteed.

unfortunately I am at the spot where I get error 5 when using bootneuter and I always get error 1015 when I am using itunes to restore a firmware. Plus NO CARRIER

Originally Posted by XERXES

If you get 1015 Error - all OK. downgrade baseband and restore 114 again - after unlock with any software.

Is downgrade baseband also equals erase baseband in Ziphone? Or which tools can I use for that?

I already used bootneuter to downgrade my bootloader to 3.9, but unlock is missing and cannot be performed, I get an error 5.

Originally Posted by kirk1gr

DUDE where were you 2 nights ago.....i was going crazy with the 20 message......
thanks for the info
thats what drives everybody crazy dfu and restore 2 different things........ i did know the difference
thanks again

What do you mean ???