Comex has released the source code to the Spirit jailbreak for other developers to take a look at.

This is painful. But. *sigh* http://spiritjb.com/spirit-source-n-stuff.tar.bz2. (To preempt any questions: this is not a new jailbreak or anything useful to non-developers.)

When asked why he was releasing it comex replied, Because I promised to.

In regards to the new firmware releases by Apple comex says, 3.2.1 and 4.0.1 out. if you want an unlock, DO NOT UPDATE. No, the jailbreak is not ready yet.

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Dev_team has been working on iPhone 4 unlock for a week now.Complete progress report on unlock for iPhone 4 can be found here. Today, MuscleNerd confirms that iPhone 4 unlock is just one final step away.

This is what he just tweeted:

Full i4 bars with custom “steve” background task spitting out “One more thing” http://is.gd/doJXt – all pieces in place:)

It means the “next step” demoed in http://is.gd/doLnz has been reached, so now there’s just 1 final step

Next step is to keep the task backgrounded like we did for 3G/3GS http://is.gd/dh7Jh. Backgrounded task is the unlock.

Great news for everyone waiting to unlock iPhone 4 on iOS 4. As far as iPhone 4 jailbreak is concerned, Comex has already taken care of it and now waiting for the iOS 4.01 / 4.1. GeoHot has also successfully jailbreak iPhone 4 but there’s no ETA from him.

WARNING: If you’re waiting to unlock iPhone 4 or want to jailbreak iPhone 4, make sure not to update to any future firmware updates otherwise you won’t be able to unlock/jailbreak iOS 4.

[via iphoneheat.com]

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A lot of iPhone 3G owners—myself included—have discovered that upgrading to iOS 4 has slowed their devices to a crawl. If you decide the new features and shortcuts just aren’t worth the glacial performance, here’s how to downgrade your iDevice.

Note: The process should work nearly the same on Windows and OS X, so unless we say otherwise, you can follow the same steps on each. The main difference between Windows and OS X is RecBoot, so Windows users, make sure you pay close attention to the RecBoot process before diving in. The same basic steps should likely work for iPhone 3GS, according to our 3GS-toting intern Adam Dachis, who’s used a similar method in the past. (Still, I haven’t been able to verify, so proceed at your own risk, and if you do, let us know how it worked in the comments.) Lastly, you should read through the entire guide before you dive in, just so you know what you’re getting into. Image remixed from drewm.

Update: If you’re on 3GS and having trouble with this method, reader Richard notes that for 3GS users: “Apple started signing their restore files requiring iTunes to “Phone home” and get permission to restore. Usually within 24 hours of a new firmware release, Apple stops signing the old versions preventing you from restoring back to an older version. The advice in your article about how to downgrade to 3.1.3 no longer works [for 3GS] because a few days ago Apple stopped signing that firmware.” If you’re a 3GS user experiencing this problem, check out this forum dedicated to 3GS downgrading.
Step 1: Find or Download iOS 3.1.3 and RecBoot

The first thing you need to do is get a copy of the iPhone OS 3.1.3 image. There’s a good chance you’ve already got a backed up copy of the 3.1.3 release on your system, so let’s check there first. On OS X, check in ~/Library/iTunes/iPhone Software Updates. On Windows, your iPhone OS updates should be stored in C:\Documents and Settings\[username]\Application Data\Apple Computer\iTunes\iPhone Software Updates (or to get there more quickly, type Win+R and paste %appdata%\Apple Computer\iTunes\iPhone Software Updates). If you see a file inside this folder corresponding to iPhone1,1_3.1.3_7E18_Restore.ipsw or iPhone1,2_3.1.3_7E18_Restore.ipsw, those are likely the restore images you need.

If you don’t see anything that resembles the 3.1.3 OS or you just want to download a fresh version for good measure, web site iClarified has maintained a list of iPhone firmware files. Just find 3.1.3 for your phone (the 3G version points here and it’s what I used successfully) and download the 228MB file.

Next, download RecBoot from here (available for Windows and Mac). This handy little utility plays an important role in finishing off the downgrade.
Step 2: Put Your Phone Into DFU Mode

You need to put your iPhone into Device Firmware Update (or DFU) mode in order to downgrade to 3.1.3. The video above demonstrates the process, but in case you prefer a little text:

1. Plug in your iPhone.
2. Power it down by holding the sleep/lock button and sliding to power off.
3. Once it’s powered down, press and hold both the sleep/lock button and the home button for ten seconds.
4. After ten seconds, release the power button but continue holding down the home button.
5. If you did it right, iTunes will pop up a window (like the one below) telling you that it’s detected an iPhone in recovery mode and your iPhone’s screen will be black. If it didn’t work, start from the beginning and try again.

Step 3: Restore iOS 3.1.3

Now that you’ve done all the legwork, it’s downgrading time. You can either follow the video above or follow along with the instructions below.

Dismiss the iTunes alert that told you you’re in recovery mode, make sure you’ve clicked the iPhone under the Devices sidebar in iTunes, then hold Shift and click the Restore button (if you’re on OS X, Alt/Opt+Click). iTunes will pop up a window prompting you to choose a file. You want to navigate to the 3.1.3 OS you located or downloaded above. Select that file, and iTunes will start the OS restore process. Expect this to take around 10 minutes or so.

When it’s finished, you’ll likely receive an error message like the one above (error 1015) and your iPhone will boot up with a “Connect to iTunes” screen. This is where the utility you downloaded above, RecBoot, comes in handy. Open RecBoot, and click Exit Recovery Mode. In a few seconds, RecBoot should kick you out of plug-me-into-iTunes recovery mode and you’ll boot right into your freshly downgraded 3.1.3.

Note: I used RecBoot in OS X, and from what I’ve read, the Windows version may have some peculiarities. First, you’ll need .NET 4.0. Second, you may need to run the application in Compatibility mode if you’re not running Windows XP (Right-click the EXE -> Properties -> Compatibility -> Run this program in compatibility mode for Windows XP). You’ll also need to download libusb, which may also be peculiar on 64-bit systems. Read up on using RecBoot on Windows here.

Step 4: Restore Your Backup

At this point, you’ve got a fresh 3.1.3 installation, but you probably want to sync your apps and data back to your phone as they were before you downgraded. If you’re lucky, you’ve got a backup saved from before you upgraded to 4.0 (you can select different backups from the drop-down menu). If you don’t have a pre-4.0 backup, you’re unfortunately out of luck—iTunes won’t let you restore data from a 4.0 backup to your downgraded 3.1.3.

This method worked like a charm for us, but your mileage may vary. If you had a different experience, can offer more insight to the Windows downgrade process (particularly with RecBoot), or know of a better downgrade method, let’s hear about it in the comments.

If your iPhone 3GS was not previously jailbroken with anything other than Spirit, iTunes used to throw an error whenever you tried to restore your phone with custom firmware. Sn0wbreeze 1.6.2 later brought support for these Spirit’ed devices. But in case if you are still getting problems restoring to custom cooked iOS 4 firmware (from PwnageTool or Sn0wbreeze), you can use Spirit2Pwn patch to perfectly restore your iPhone 3GS on iOS 4 custom firmware.

NOTE: This applies to iPhone 3GS with old bootrom, previously jailbroken on iPhone 3.1.3 using Spirit.

Step 1: Start Cydia on your iPhone 3GS (old bootrom, jailbroken on 3.1.3 using Spirit) and touch on “Manage” tab on the bottom. Now touch on “Sources” as seen in the screenshot below.

Step 2: Touch on “Edit” and then on “Add”. You will be prompted to enter a url source as seen in the screenshot below. Type “http://repo.woowiz.net” and touch on “Add Source”.

Cydia will now automatically update your sources by following a series of automated steps.

Step 3: Once the repository has been added successfully, Search for “Spirit2Pwn” in Cydia and install this application.

Step 4: Now from here onwards, simply follow guides on how to jailbreak iOS 4 on iPhone 3GS using PwnageTool 4.0 / 4.0.1 for Mac, and Sn0wbreeze 1.6 for 4.0 on Windows guide.