Tried to snowbreeze my 4.1 to 4.2.1 - iPhone stuck on black screen. Help!

[crewxp]

I tried to snowbreeze my phone from 4.1 to 4.2.1 just now to update and preserve my baseband. I created a custom ipsw in breeze, ran the TU server, and restored to the custom firmware. It finished and my iPhone didn't boot up.

I tried using iREB and 'Fix Recovery' in TU but is stuck in the black screen no matter what I do.

Suggestions?

[crewxp]

I managed to get it to try and install the snowbreeze ipsw again, it installs, but loops back to the black screen after its finished. If I try to install the ipsw again, I get iTunes error 1600. I have to prep it for greenpoison again and do it all over again.

i also tried redshow, it works, show my iPhone, but after I shut it down, it stays black unless I boot tethered. Still on 4.1

Any suggestions? I'm worried now I bricked it.

Update: When I use tinyumbrella to kick it out of recovery, it says 'Unable to find gbdevlist' and other things, loads greenpoison then loops back to the black screen of death.

Update2: I tried installing a fresh 4.1 ipsw also. It installs, then itunes gives me a 1004 error. I kick out of recovery mode and then it goes to the unable to find gldevlist GreenPoison screen again!! I think the issue is with that.

Ahh.. 6am and still can't do it!

[iYeow]

Point your hosts file towards apple server for verification of 4.1 restore as apple resigns 4.1.
Restore to custom firmware of 4.1 again.

If you are restoring to 4.2.1, make sure you start tss server with 4.2.1 shsh saved in Tiny Umbrella, otherwise it will end up in DFU mode.

[Amabeo]

Hi iYeow, I have one question. If i'm stucked in DFU loop (4.3.3 fw without shsh, 05.12.01 BB) is it possible to get my phone back? I have to use it unlocked. Any information will be very helpful. Please I need some help.
Thank you!

[iYeow]

No shsh means you cannot restore to 4.3.3 and that is why you ended in dfu mode.
Create a custom firmware of IOS 5 from Redsn0w 0.9.9b5 for Mac , put iphone into pwned dfu and restore to it through itunes to preserve your bb.
Then jailbreak it with redsn0w and unlock with Ultrasn0w.

Always stay away from stock fw , you don't want to loose your unlockable bb.

[Amabeo]

Thank you very much!.. Are there many bugs or errors with custom IOS 5 from Redsn0w?? Because I see lots of ppl asking for IOS 5 downgrades. Once again Thank you!

[iYeow]

I don't think you have any choice except you can always restore to custom firmware of 4.1 as apple resigns back this fw.
Only thing is ibooks, not being able to sign in to get ibooks but you can download onto itunes and sync. Just jailbroke my 3gs with redsn0w at IOS 5.

[Amabeo]

Can I restore to custom 4.1 fw (which program should I use?) if I have already restored it to 4.3.3 fw?
Thank you!

[iYeow]

If you are on a PC, go download snowbreeze , here : iH8sn0w.com

[sigit]

is anybody can help me?
after jailbreak my idevice 4.1 with snow breeze,i use gevey sim card to unlock it.. and after about one hour my iphone stuck in black screen but when i connect to laptop itunes can read it,but my iphone still in black screen like power off...

any idea,please...

TIA..

is anybody can help me?
after jailbreak my idevice 4.1 with snow breeze,i use gevey sim card to unlock it.. and after about one hour my iphone stuck in black screen but when i connect to laptop itunes can read it,but my iphone still in black screen like power off...

any idea,please...

TIA..

[iYeow]

Have you tried a Hard reset. What version of snowbreeze did you use to restore your 3g or 3gs ( cos you didn't mention ).