en-us https://www.intensedebate.com/users/574507 Comments by kbw1011 http://blog.iphone-dev.org/post/726179754#IDComment81767377 You need to check your bootrom first. If it is the new bootrom then it will not work. There are tutorials on how to check your bootrom for windows and mac if you just google. Wed, 23 Jun 2010 19:10:58 +0000 http://blog.iphone-dev.org/post/726179754#IDComment81767377 http://blog.iphone-dev.org/post/726179754#IDComment81766940 sorry I missed that you aren't activated. That won't work. Wed, 23 Jun 2010 19:09:23 +0000 http://blog.iphone-dev.org/post/726179754#IDComment81766940 http://blog.iphone-dev.org/post/726179754#IDComment81766584 You should be able to jailbreak using Spirit and then use Ultrasn0w to unlock if you just want a working phone. There is currently no way to get iOS 4.0 jailbroken on the new bootrom though and by using Spirit you might be closing some doors for future options through PwnageTool. Wed, 23 Jun 2010 19:08:16 +0000 http://blog.iphone-dev.org/post/726179754#IDComment81766584 http://blog.iphone-dev.org/post/726179754#IDComment81765693 What do you need to do? Wed, 23 Jun 2010 19:05:04 +0000 http://blog.iphone-dev.org/post/726179754#IDComment81765693 http://blog.iphone-dev.org/post/726179754#IDComment81765055 Google "downgrade 3.1.3 to 3.1.2" then in the first hit look for the link that says tutorial and it will explain the steps necessary. Wed, 23 Jun 2010 19:03:35 +0000 http://blog.iphone-dev.org/post/726179754#IDComment81765055 http://blog.iphone-dev.org/post/726179754#IDComment81761651 If you get an Apple logo recovery loop you can try iRecovery to get it out of this loop. Wed, 23 Jun 2010 18:52:21 +0000 http://blog.iphone-dev.org/post/726179754#IDComment81761651 http://blog.iphone-dev.org/post/726179754#IDComment81761093 Yes you can downgrade to 3.1.3 and jailbreak using Spirit. Then use Ultrasn0w to unlock. You just won't be able to go to a jailbroken 4.0 after using Spirit to jailbreak 3.1.3. Wed, 23 Jun 2010 18:50:43 +0000 http://blog.iphone-dev.org/post/726179754#IDComment81761093 http://blog.iphone-dev.org/post/726179754#IDComment81760321 You have to find a copy of the firmware and install it through iTunes. If it is on file with Cydia you will have to do some work to get iTunes to verify the signature on Cydia's server rather than Apple's server. There are plenty of tutorials out there for that. Wed, 23 Jun 2010 18:47:59 +0000 http://blog.iphone-dev.org/post/726179754#IDComment81760321 http://blog.iphone-dev.org/post/726179754#IDComment81758790 That should work if you have a trusted source for the custom firmware. Just make sure you are in recovery mode when you install it. Wed, 23 Jun 2010 18:42:45 +0000 http://blog.iphone-dev.org/post/726179754#IDComment81758790 http://blog.iphone-dev.org/post/726179754#IDComment81757565 If you have SHSH on file you should be able to downgrade. Once downgraded you will have to jailbreak using something other than Spirit. Then use PwnageTool 4.01 to create a custom firmware and install it through iTunes with the iPhone in recovery mode. Wed, 23 Jun 2010 18:39:39 +0000 http://blog.iphone-dev.org/post/726179754#IDComment81757565 http://blog.iphone-dev.org/post/726179754#IDComment81756014 Redsn0w is still a beta so you have to point it at a beta version of 4.0. Wed, 23 Jun 2010 18:35:16 +0000 http://blog.iphone-dev.org/post/726179754#IDComment81756014 http://blog.iphone-dev.org/post/726179754#IDComment81755499 If you have downgraded to 3.1.2 and get 1015 error I would just use blackra1n to jailbreak 3.1.2. Then create custom firmware with PwnageTool 4.01 and install it through iTunes with phone in recovery mode. Wed, 23 Jun 2010 18:33:27 +0000 http://blog.iphone-dev.org/post/726179754#IDComment81755499 http://blog.iphone-dev.org/post/726179754#IDComment81755072 iRecovery should get it out of recovery loop. Wed, 23 Jun 2010 18:32:05 +0000 http://blog.iphone-dev.org/post/726179754#IDComment81755072 http://blog.iphone-dev.org/post/726179754#IDComment81754624 To answer your other questions, I would not update to 3.1.3 and use Spirit since the dev team says those phones can't be upgraded to jailbroken 4.0 using PwnageTool either. My suggestion is to jailbreak 3.1.2 using blackra1n and wait for a 4.0 jailbreak that is compatible with your phone. Wed, 23 Jun 2010 18:30:23 +0000 http://blog.iphone-dev.org/post/726179754#IDComment81754624 http://blog.iphone-dev.org/post/726179754#IDComment81754073 You can follow the steps to check your bootrom if you really want to. However, any serial that begins with MC is a new bootrom which currently doesn't work with PwnageTool. Wed, 23 Jun 2010 18:28:36 +0000 http://blog.iphone-dev.org/post/726179754#IDComment81754073 http://blog.iphone-dev.org/post/726179754#IDComment81753462 Redsn0w jailbreaks the firmware currently installed on the phone. Therefore you have to install iOS 4.0 before you can use redsn0w to jailbreak 4.0. Wed, 23 Jun 2010 18:26:40 +0000 http://blog.iphone-dev.org/post/726179754#IDComment81753462 http://blog.iphone-dev.org/post/726179754#IDComment81751652 No way to do it as of right now since you have new bootrom. Wed, 23 Jun 2010 18:20:42 +0000 http://blog.iphone-dev.org/post/726179754#IDComment81751652 http://blog.iphone-dev.org/post/726179754#IDComment81751076 The only way you'll be able to jailbreak right now is if you have SHSH on file so that you can downgrade to 3.1.2. If not you will have to wait for another means of jailbreaking 4.0 since you have already installed it. Wed, 23 Jun 2010 18:19:04 +0000 http://blog.iphone-dev.org/post/726179754#IDComment81751076 http://blog.iphone-dev.org/post/726179754#IDComment81532111 You can use redsn0w after upgrading if you have 3G. Wed, 23 Jun 2010 02:04:10 +0000 http://blog.iphone-dev.org/post/726179754#IDComment81532111 http://blog.iphone-dev.org/post/726179754#IDComment81531097 Pick mine up 7:00 AM, Thursday from the Apple Store down the street. Wed, 23 Jun 2010 02:00:53 +0000 http://blog.iphone-dev.org/post/726179754#IDComment81531097