Guide

Jailbreak Your iPhone 3.1.2 Using Sn0wBreeze

Sébastien Page ∙ January 23, 2010

I had heard several times about Sn0wBreeze but I never really paid attention to it because it seemed to be one of these tools that would never get out of beta. I was wrong!

Today I received a couple emails from readers of the blog with more info about Sn0wBreeze, and Thomas even sent me a pretty detailed tutorial (thanks Thomas).

Sn0wBreeze is a jailbreaking tool developed by some underground developer and from what I understand, it's pretty much a rip off of Dev Team's PwnageTool, except it works on Windows. As a side note, it's important to highlight that the Dev Team came up with an update to RedSn0w (see RedSn0w tutorial here).

Just like PwnageTool, Sn0wBreeze will create a custom firmware for iPhone OS 3.1.2. This is the perfect solution for people who want to upgrade to OS 3.1.2 without updating their baseband.

I haven't tried this myself but as I said above, I got reports from 2 different people that it works flawlessly. Obviously, you should be cautious if using Sn0wBreeze...

This version of Sn0wbreeze only supports the iPhone 2G, 3G and 3GS (non MC) as well as the iPod touch 1G and 2G (non MC) so far.

This step-by-step guide and tutorial will show you how to jailbreak your iPhone 3.1.2 by creating a custom firmware with Sn0wBreeze.

Step 1: Make sure you have the latest version of iTunes installed on your PC. If not, download and install it, then reboot your PC.

Step 2: Download Sn0wBreeze as well as the right firmware 3.1.2 for your device from our download page. To make things easier, I suggest you place these 2 files on your desktop.

Step 3: Launch Sn0wBreeze and select "Simple Mode".

Step 4: SnowBreeze will then ask you to browse for your IPSW file. Click "Browse" and select the 3.1.2 IPSW file you downloaded to your desktop in Step 2.

Step 5: Sn0wBreeze will then verify your IPSW. Click Next to continue.

Step 6: Sn0wBreeze will now ask you if you want to activate your iPhone. If you are on an official carrier (ie. AT&T in the US), say no. If you are not on an official carrier, then click yes.

Step 7: SnowBreeze will now create the custom firmware for your iPhone.

Step 8: Now launch iTunes and we will restore your iPhone using the custom cooked firmware we just created. To do so, hit the SHIFT key on your keyboard while clicking on RESTORE. It's very important that you hold the SHIFT key while clicking! iTunes will ask you the location of the firmware you want to use to restore your iPhone. Browse for the custom IPSW (most likely on your desktop) and select it.

Step 9: Your iPhone will now be restored using the custom firmware. This might take a while so don't stress out.

Done! You have successfully jailbroken your iPhone using Sn0wBreeze. Next step for you might be to unlock your iPhone. Follow this guide to figure out how to unlock your iPhone, depending on what model you have.

Jailbreak iPhone 3.1.2 with RedSn0w 0.9

Sébastien Page ∙ Updated January 31, 2010

This guide and tutorial will show you how to jailbreak your iPhone 2G, 3G or 3GS running OS 3.1.2 using RedSn0w 0.9.

If you are new to the whole jailbreaking thing, I really suggest you read this information about RedSn0w 0.9. It will tell you everything you need to know about RedSn0w before starting.

I know that some of you won't bother reading the more info link about RedSn0w 0.9 so here is probably the most important information about this jailbreak:

If you have a late-model iPhone 3GS, or if you have an iPod touch 2G whose serial number begins with “MC”, you can use redsn0w to jailbreak but you are currently restricted to “tethered” rebooting. That means you need to connect your device to a computer to complete the boot after a reset. Also, these devices cannot have custom logos.

redsn0w will ask you whether or not you fit in this category when used with the iPhone 3GS or iPod touch 2G. If you have a late-model device and don't give redsn0w the correct answer, you will likely need to do a system restore to recover from the mistake.

To do a tethered boot after your late-model device resets for some reason, either run redsn0w again and select “Just boot tethered right now”, or run blackra1n.

This RedSn0w tutorial was written for Windows but I assume the steps are identical for a Mac.

Step 1: Download RedSn0w 0.9 for Mac or PC as well as the correct 3.1.2 firmware for your iPhone from here. To make things easy, save those 2 files on your desktop.

Step 2: Make sure you have the latest version of iTunes installed on your computer, then restore your iPhone to the latest firmware 3.1.2. Restoring is the preferred way to go about it as simply updating could cause issues later on.

Step 3: Launch RedSn0w and browse for the 3.1.2 firmware you downloaded to your computer in Step 1.

Step 4: RedSn0w will automatically check if you chose the right firmware (IPSW). It will then patch the file.

Step 5: For iPhone 2G only (other please skip to step 6)! You will then be offered several options. If you have an iPhone 2G and you want to unlock, now select "Install Cydia" and "Unlock". You will have to download the bootloaders 3.9 and 4.6 from here. If you just want to jailbreak, disregard this and go to step 6.

Step 6: You will now have the option to "Install Cydia" as well as "Custom boot logo" and "Custom recovery logo". For the purpose of this tutorial, I suggest you only choose "Install Cydia".

Step 7: Make sure your iPhone is plugged to your computer. RedSn0w will now dictate you a few steps to have your iPhone enter DFU mode. Follow the onscreen instructions very carefully.

Step 8: Your iPhone will reboot when successfully jailbroken.

Congratulations! You just jailbroke your iPhone using RedSn0w 0.9. If you want to unlock your iPhone 3G or 3GS, simply install UltraSn0w from Cydia.

Any question or concern, please feel free to ask in the comment section below. Happy jailbreak :)

UPDATE: People have encountered quite a bit of problems when running RedSn0w o.9 beta 3 with an iPhone 3GS. Thankfully MuscleNerd has been updating RedSn0w and the 3GS issues should now be gone. You can download the latest RedSn0w from our iPhone downloads page.

How to Jailbreak iPhone 3GS 3.1 on Windows Tutorial

Sébastien Page ∙ October 3, 2009

This step-by-step guide and tutorial will show you how to jailbreak firmware 3.1 for iPhone 3GS using a Windows PC. If you have a Mac, you might as well follow this tutorial.

This guide is just a workaround as there is no official iPhone 3GS 3.1 jailbreak tool for Windows yet. We are going to get a custom firmware cooked on a Mac machine and install it on your iPhone 3GS on a PC. This is a safe and simple way to update your iPhone 3GS to a custom jailbroken 3.1 firmware.

Tutorial: Jailbreak & Unlock iPhone 2G 3.1 Using PwnageTool

Sébastien Page ∙ Updated October 13, 2009

This guide and tutorial will show you step by step how to jailbreak and unlock your iPhone 2G using PwnageTool for Mac. At the time I am writing this, only PwnageTool for Mac is available to jailbreak or unlock iPhone 2G 3.1. Tools for PCs should be available soon. For the latest information about jailbreaking methods (including iPhone 3G and 3GS), I suggest you read our jailbreak page.

UPDATE: This tutorial also works for iPhone OS 3.1.2. Instead of using the 3.1 firmware, simply use a 3.1.2 firmware.

Please make sure you read and understand everything before starting the process. If you're new to jailbreaking, please take the time to follow the tutorial step by step. Problems often come when people want to go to fast or skip a step, so again, please take your time to read and understand every step.

1. First, make sure you have the latest version of iTunes installed on your computer. If not, update to the latest iTunes available.

2. On your desktop, create a folder called "jailbreak". In this folder download and save the following files available from our downloads page:

PwnageTool 3.1 3.1 IPSW firmware for iPhone 2G (iPhone1,1_3.1_7C144_Restore.ipsw), or 3.1 firmware for iPhone 2G (iPhone1,1_3.1.2_7D11_Restore.ipsw) if you want to jailbreak 3.1.2 BL 3.9 BL 4.6

When downloading the 3.1 firmware, make sure you use FireFox and not Safari as Safari often brings up unwanted issues. To download PwnageTool, you will need a torrent downloader such as uTorrent.

3. Launch PwnageTool. Click OK to the warning message. Then choose "Expert Mode".

4. Choose your device. It should be the one on the very left. A green check mark should appear when you click on it. Click the blue arrow to continue.

5. You will now be able to "Browse for IPSW". Click on it and look for the 3.1 firmware you downloaded in step 2. Select the IPSW file and click the blue arrow to continue.

6. You should now be taken to the general menu where you have 7 different options. Choose "General".

7. In the "General settings", make sure that "activate the phone" and "enable baseband update" are checked. This is important. Again, make sure these 2 options are checked. Change the root partition size to about 600 MB and click the blue arrow to continue.

8. In the "Bootneuter settings", check "Neuter bootloader", "Unlock baseband", and "Auto-delete bootneuter.app", then click the blue arrow to continue.

9. You should now be in the "Cydia settings". This allows you to install packages so you don't have to do it later via Cydia. I like to install my packages manually but feel free to select a few if you want to. I will skip this step. Click the blue arrow to continue.

10. In "Custom packages settings", I recommend only checking Cydia. Icy is quite unstable so I don't recommend installing it. Do as you want but make sure at least Cydia is checked. Click the blue arrow to continue.

11. You are now taken to the "Custom logos settings". You can choose pre-selected logos or upload your own. I don't recommend installing any. I suggest unchecking the 2 custom logos that are pre-selected, then click the blue arrow to continue.

12. You should now be back to the general menu. It is time to start building your custom firmware. Click "Build", then click the blue arrow to continue.

13. If you haven't pwned your iPhone before, you will have to upload the bootlader files you downloaded in step 2. Follow the instructions on the screen to upload BL 3.9 and BL 4.6.

14. PwnageTool will then ask you if "you have an iPhone contract that would activate normally with iTunes". If you're using an official phone carrier (ie AT&T in the US, 02 in UK, etc...), and don't want to unlock your iPhone, click YES. Your iPhone will just be jailbroken. Click NO if you want to unlock your iPhone to use with other carriers.

15. You will now have to save your custom IPSW. Save it to your "jailbreak" folder on your desktop. PwnageTool will now create your custom IPSW which may take up to 15 minutes.

16. If asked for it, enter you admin username and password.

17. PwnageTool will ask you if your iPhone has been pwned before. Just say No.

18. This is a very important step. PwnageTool will ask you to turn off your device, the put it into DFU mode. After turning off your iPhone, follow the on-screen instructions to put your iPhone into DFU mode. Hold the power and home buttons for 10 seconds. Let go of the power button but keep holding the home button until you enter DFU mode. If you fail, PwnageTool will give you an error message and you will have the opportunity to start over this process until completed successfully.

19. Once your in DFU mode, launch iTunes if it hasn't already launched automatically. It will tell you that iTunes has detected an iPhone in recovery mode. Click OK.

20. We will now restore your iPhone using the custom firmware you created. In iTunes, hold the Alt/Option key while clicking "Restore". This is extremely important that you hold the Alt/Option key while clicking. A window will pop up and will let you browse for the custom firmware you created (which should now be saved in your "jailbreak" folder). Select it.

21. The restore will start, which may take up to 15-20 minutes. Once done, your iPhone will reboot.

Congratulations! You just jailbroke and unlocked your iPhone. If you have any question or comment, please leave a comment below.

Tutorial: Jailbreak iPhone 3G on 3.1 Using PwnageTool

Sébastien Page ∙ Updated October 3, 2009

This guide and tutorial will show you how to jailbreak your iPhone 3G running firmware 3.1, using PwnageTool for Mac OS X. So far, only PwnageTool is available for jailbreaking the 3.1 iPhone 3G and it is only for Mac. I believe a RedSn0w method for both Mac and PC will be available soon.

1. Make sure you have installed the latest version of iTunes (iTunes 9).

2. On your desktop, create a folder called "jailbreak" or whatever name you want to give it. It doesn't really matter. Download PwnageTool 3.1 and the 3.1 IPSW (iPhone1,2_3.1_7C144_Restore.ipsw) from here and save them into the "jailbreak" folder. Note that you should download the firmware using FireFox as Safari often brings up issues. Also note that the PwnageTool download link is a torrent and you will need a torrent downloader (ie. uTorrent) to download it.

3. Launch PwnageTool. It will give you some sort of warning. Just click OK. On the next screen, choose the "Expert Mode".

4. Select your iPhone model and click the blue arrow to continue.

5. Browse for the IPSW you downloaded in step 2. You should then get a green check mark.

6. You will now be offered several options. Choose "General". Make sure the "Activate the phone" box is left UNCHECKED if you use an official carrier (such as AT&T in the US, Roger in Canada, etc...). This is very important. If you are not using an official carrier, then CHECK "Activate the iPhone".

7. Increase the root partition size to 700 MB. This is not necessary but it is safer. Then click the blue arrow to continue. Click the blue arrow one more time to skip the bootneuter settings, which aren't available for the iPhone 3G.

8. You will now have the possibility to pre-install a few packages from Cydia so you don't have to do it manually later. I will skip this part. Click the blue arrow to go to the next step.

9. You will now be in the "Custom packages settings". Make sure Cydia is selected and you may want to select Icy as well. For what it's worth, I do not use Icy. I only use Cydia but you're free to select both if you want. Whatever you do, make sure at least Cydia is selected. Click the blue arrow to continue.

10. You can now set your own "Custom logos settings". I don't use any but again, you can choose the one pre-selected or you can even upload your own. If you choose to upload your own, remember the logo mustn't be bigger than 320 x 480. Click the blue arrow when done to continue.

11. It is now time to start the pwnage process. You should be on the main options screen offering you 6 different options. Choose "Build" and click the blue arrow to continue.

12. You will now have to save your custom IPSW file. Save it in the "jailbreak" folder we created in step 2.

13. Your custom IPSW firmware will now be built, which may take up to 15 minutes, so be patient.

14. You will most likely be asked for your administrator password. Fill in the blanks and click OK.

15. You will then be asked if your iPhone has been pwned before. Just answer "No".

16. Now is the most important step. You will first be asked to turn off your iPhone. Follow the instructions on your computer screen to put your iPhone into DFU mode. Basically, you have to hold the home and power buttons together for 10 seconds, then release the power button but still hold the home button. If done correctly, PwnageTool will tell you you successfully entered the DFU mode.

17. If iTunes hasn't launched automatically, open it. iTunes should tell you it has detected an iPhone in recovery mode. Click OK.

18. In iTunes, hold the "Alt/Option" key and click Restore at the same time. DO NOT click "restore" without holding the "Alt/Option" key! A window will pop up and you'll be able to choose the custom IPSW file you created in step12 that you saved in your "jailbreak" folder.

19. iTunes will now work on restoring your iPhone using the custom firmware.

20. Done! You will now be offered the option to set up your iPhone as a new phone or restore from a previous backup. I personally like to start fresh and I always choose to set it up as a new phone, but it's your choice.

21. You should now see the Cydia icon on the second page of applications on your iPhone. Congratulations, you just jailbreaked your iPhone 3G 3.1 with PwnageTool.

If you have any question or concern, please leave a comment.

Tutorial: Jailbreak iPhone 3GS Using RedSn0w

Sébastien Page ∙ Updated July 31, 2009

This guide and tutorial will show you how to jailbreak your iPhone 3GS using RedSn0w. After jailbreaking your iPhone 3GS, you will be able to unlock it using UltraSn0w should you want to.

Note that this tutorial is for the iPhone 3GS but the steps are the same for the iPhone 2G, iPhone 3G and iPod Touch 2G. Read this for more information about the jailbreak that best fits your needs. This was done on a PC but I assume the steps are the same for Mac and Linux.

Jailbreak iPhone 3GS Guide:

1. First, make sure you have the latest version of iTunes installed on your computer. If you have to update iTunes, make sure you restart your computer after installing the latest iTunes.

2. On your desktop, create a folder called "jailbreak iPhone 3GS" or whatever you want to call it. In this folder, download firmware 3.0 for your iPhone 3GS and RedSn0w 0.8 from here. Unzip the RedSn0w folder.

3. Launch RedSn0w and browse for the 3.0 firmware you downloaded in the previous step. RedSn0w should be processing the chosen firmware and tell you that the IPSW was "successfully identified". Click Next.

4. RedSn0w will start working for a few seconds and then will ask you what you would like to install. You can install Cydia and Icy. I highly suggest you only install Cydia. Choose Cydia and click Next.

5. We'll now have to connect the iPhone 3GS in recovery mode. To do so, unplug it from your computer, turn it off and wait a few seconds. Then hold the home button while plugin your iPhone to the USB cable. Keep holding the home button until the "Connect to iTunes" image appears.

6. Your iPhone will then go into recovery mode and that's when the magic happens... RedSn0w will install the jailbreak, which may take a few minutes.

7. Your iPhone will restart and install a bunch of stuff. . Even though RedSn0w says "Done!", wait until the very end to click "Finish".

8. After a few minutes, your iPhone will restart. Then click "Finish".

9. Go to your iPhone springboard and you should see the Cydia icon. Note that the icon may be on the second or third page on your springboard.

10. Done!

It took me about 10 minutes to jailbreak my iPhone 3GS, including time to take screenshots and write this tutorial. It was from far the quickest and most painless jailbreak.

iPhone Jailbreaking and Unlocking Guides

Sébastien Page ∙ Updated April 18, 2018

I just added 2 new pages to the blog's navigation bar: jailbreak and unlock. I will make sure to keep these pages up to date with the latest tutorials on how to jailbreak and/or unlock your iPhone.

If you have a look at these pages, you will see that it's pretty straightforward: look for the firmware you want to jailbreak/unlock, then choose your device (2G, 3G, or 3GS) and click on the appropriate guide.

I decided to create these 2 pages because it might be a little hard for newbies to figure out what they're supposed to do or even how to search for information on this blog. This way, I make it dead simple for everyone to find relevant and clear information on both jailbreaking and unlocking the iPhone.

Note that I am starting this page with the latest 3.0 firmware. By now, most people have updated their iPhone to 3.0 and it wouldn't make much sense to list previous tutorials I wrote.

Tutorial: iPhone 3.0 Jailbreak Using RedSn0w

Sébastien Page ∙ Updated August 8, 2009

This RedSn0w guide & tutorial will show you how to use RedSn0w to jailbreak your iPhone 2G, iPhone 3G, or iPod Touch 2G. Note that this step is required to unlock your iPhone 3G using UltraSn0w later on. For more information about the latest jailbreak methods for each iPhone, I recommend you read this before doing anything.

This guide is for PC users but I assume the steps are very similar on Mac. If you want to build custom firmware files with more flexibility it is suggested that you use PwnageTool on Mac OS X (PwnageTool jailbreak tutorial - PwnageTool unlock guide).

1. Before doing anything, make sure you have the latest version of iTunes and the latest firmware 3.0 installed on your iPhone.

2. Create a new folder on your desktop. In this folder, download RedSn0w as well as the latest 3.0 firmware for your iPhone from our iPhone downloads page (make sure you pick the right firmware).

3. Unzip and launch RedSn0w.

4. Click "browse" and select the 3.0 firmware you downloaded in a folder in step 2.

5. Once the firmware has been successfully identified, click "next".

6. Select "install Cydia" and click "next".

7. Make sure your iPhone is plugged into the computer and that it is off. Click "next".

8. RedSn0w will then guide you to put your iPhone into DFU mode. Hold down the power button for 2 seconds. Without releasing the power button, also hold down the home button for 10 seconds. Without releasing the home button, release the power button but keep holding the home button for 30 seconds.

9. If done correctly, your iPhone should reboot and the jailbreak process should start. This step may take up to 15-20 minutes so be patient.

10. Once this process is over, you will get a message saying that it is "done!"

11. Click the "finish" button and reboot your iPhone. The reboot may take up to 10 minutes so again, be patient.

12. Congratulations, you just jailbroke your iPhone 3.0 with RedSn0w. Cydia should now be on your springboard :)

QuickPWN 2.2.1 Guide & Tutorial

Sébastien Page ∙ Updated January 27, 2016

If you like this post, please feel free to digg it, or subscribe to our RSS feed, or follow me on Twitter, or all of the above ;)

[digg-me]This guide will show you how to use QuickPWN to jailbreak your iPhone firmware 2.2.1. Please read carefully all the steps and warnings before attempting to use QuickPWN to jailbreak your iPhone. The following tutorial is for PC users.

UPDATE: I closed the comments on this post. If you have any question about QuickPwn, please ask your question in the forum.

How To Watch Ustream Over 3G

Sébastien Page ∙ Updated January 28, 2019

I made it clear that I'm not a big fan of Ustream. One of the concern many of you have is that it doesn't work over 3G. Well, I've got good news for you. Thanks to this simple hack, you will now be able to watch Ustream over 3G, and not only rely on wifi.

In order to do so, there are some prerequisites:

Your iPhone must be jailbroken - see quickpwn 2.2 tutorial You must install the following apps from Cydia: Mobile Substrate; OpenSSH; VoIPover3G (reboot after install) You must not be scared of playing around with your iPhone files...

Now comes the funny part! Note that from now on, I assume you are familiar with SSH. If not, there are plenty of tutorial on YouTube that will show you how to do that.

1. SSH into your iPhone and go to the root directory "/"

2. Navigate to /Library/MobileSubstrate/DynamicLibraries

3. With a text editor, open VoIPover3G.plist

4. Look for:

Filter = {Bundles = ("com.Fringland.Fring", "com.apple.AppStore", "com.audiofile.Interstate", "com.apple.MobileStore");};

Now add this part: , "tv.ustream.player"

It should look like this:

Filter = {Bundles = ("com.Fringland.Fring", "com.apple.AppStore", "com.audiofile.Interstate", "com.apple.MobileStore", "tv.ustream.player");};

Don't forget the "," and the quotation marks!

5. Save the changes you just made and upload the file back to its location: /Library/MobileSubstrate/DynamicLibraries

6. Now go to your springboard and delete the Ustream application. Reboot your iPhone and reinstall Ustream from the App Store.

7. You're good to go! Ustream should now work over 3G!

I want to thank GreenGeek to email me all these instructions! If you have such hacks you want to share with us, feel free to contact me.

Unlock Your iPhone 3G With Yellow Sn0w Guide & Tutorial

Sébastien Page ∙ Updated February 5, 2016

[digg-me]Below are instructions on how to unlock your iPhone 3G using Yellow Sn0w. Unlocking your iPhone 3G will make it possible for you to use any cellphone carrier.

Before you go any further, make sure to READ EVERY SINGLE WORD OF THIS TUTORIAL. If you think you're too cool for school, then go directly to the instructions but please, do not complain if you mess up your iPhone during the process, which is very unlikely to happen anyways...

First things first. In order to be able for you to use Yellow Sn0w to unlock your iPhone 3G, you have to be on a jailbroken iPhone that runs the latest firmware 2.2 with the latest baseband 02.28.00. To find out what firmware you're on, go to Settings > General > About and look for "Modem Firmware". It should say 02.28.00.

If you have not jailbroken your iPhone yet, you have to now in order to unlock. To jailbreak your iPhone, follow the QuickPwn 2.2 guide that I wrote a few weeks ago.

If you have already jailbroken your iPhone using PwnageTool to preserve your baseband, sorry but you have to restore and rejailbreak again in order to have the latest 02.28.00 baseband.

If you have updated to the latest firmware 2.2 with its latest 02.28.00 baseband, then you're good to go.

So from now on, I assume that you are on a clean firmware 2.2 with firmware 02.28.00 and that your iPhone is jailbroken.

1. Go to Cydia and install this new source: http://apt9.yellowsn0w.com/ (note that snow is spelled with a zero, not an "o"). To install a new source in Cydia, go to Manage > Sources > Edit > Add, then type in the source http://apt9.yellowsn0w.com/ and tap "Add Source".

2. Once the source has been added, tap "Return To Cydia", then tap "Done".

3. Now tap "apt9.yellowsn0w.com from the list of sources "Entered By Users".

4. Select Yellow Sn0w, then tap install nad confirm.

5. Once the installation had been successfully completed, return to Cydia.

6. Hard reset your iPhone. To do this, hold the home and power buttons simultaneously for a few seconds until the phone shuts off by itself (ignore the "slide to power off" message)

7. Insert whatever SIM card you want! Wait a few seconds and you should be good.

8. Done!

See, that wasn't too hard at all. Users that are already familiar with Cydia and sources shouldn't have any problem at all. But first time jailbreakers might be a little lost, which is why I detailed this tutorial a lot.

Now there are a few known issues with Yellow Sn0w and I highly recommend you either read my previous post about it, or go directly to the Dev Team's blog.

Troubleshooting:

1) If you are on tmobile USA you should disable 3G in Settings or sbsettings. 2) YellowSn0w does not work with a SIM PIN. You must disable your SIM card pin lock.

At any rate, I would really appreciate it if you could digg this post, then write a comment, then go to the Dev Team's blog to thank them for their great work.

iPhone 3G Unlock Is Now Available

Sébastien Page ∙ Updated February 5, 2016

Yellow Sn0w, the soft unlock created by the Dev Team is now available from Cydia or Installer. Instead of rewording what the Dev Team has to say about it, I will simply copy/paste their entire post from their blog.

I don't like copy/pasting large amounts of texts from other sites, but in this case, I find it really necessary. I really recommend you go over to the Dev Team's blog, read the post from there, and write a nice thank you comment.

For those of you that don't care about the fine prints, here are the repos for Yellow Sn0w. Cydia source: http://apt9.yellowsn0w.com/ Installer repo: http://i.yellowsn0w.com/

I will be writing a guide wrote an iPhone 3G unlock tutorial on how to unlock the iPhone 3G using YellowSn0w.

Again, please make sure to visit the Dev Team's blog and thanks these guys for spending New Year's Eve behind a computer screen so everyone can have an unlocked iPhone.

From the Dev Team Blog:

BASICS

The unlock works exclusively with baseband 02.28.00. This baseband is provided by the latest firmware update (2.2) from Apple. You’ll need to upgrade to this release using iTunes and then use QuickPwn to activate etc. There are plenty of tutorials about this on iclarified, bigboss, and other established tutorial sites. Because it works on 02.28.00, it is available to everyone on the planet. This means we don’t need to unnecessarily expose holes in earlier basebands, which is an important concern. The application is a small daemon that is launched on boot. It injects the payload at boot and also whenever there is a baseband reset. You won’t notice anything about it other than that your third-party sim now works. It’s a small program and unobtrusive. There is no GUI (this is by design). You can add the application using the sources outlined below (coming soon). There are Cydia and Installer sources available, so use whichever you are comfortable using. yellowsn0w is completely removable through Cydia, the command line, and iTunes.

DETAILS

There is a known issue with SIM cards that have STK (SIM Toolkit) application menus. These menus are usually items such as “top up” “get credit” “lotto numbers” etc. These menu items confuse the application sometimes. Removing and reinserting the SIM once after reboot (give it about 10 secs 60 seconds (with v0.9.1) after you see the slide to unlock widget) fixes this issue. We’re working on a better fix. For those of you using SIM cards without STK menus, the application has some optional arguments that will make the unlock much faster for you. So either experiment on your own (use “yellowsn0w -h” for usage) or wait for a customization writeup. After you install yellowsn0w via Cydia, you should return to the Cydia main menu then reboot your iPhone with the 3rd party SIM installed. Wait for the slide to unlock screen, then wait 10 or 15 secs more. If you don’t see your carrier name pop up, then remove your SIM, reinsert it, and wait 10 secs more. This is the step we’ll be working on eliminating next.

RANDOM

The application is version 0.9 0.9.1. This is considered beta software, you use it at your own risk. You know the score. The application is released on a non-commerical basis. Please do not accept pirates and scummy ripoffs of this software. We license this software for single use and in a non-commerical environment (meaning you can’t charge for it). The techniques and methods used are not to be used by third party companies. We are watching you Jody…we won’t be so forgiving this time. Direct linking to the repository URLs is prohibited, please only link to this post. We will be checking referers. Happy 2009 and enjoy!

The iPhone 3G is used all over the world with all sorts of SIM cards, and we almost certainly will see untested and unexpected situations. If the soft unlock doesn’t work for you on day 1 (literally day 1, of 2009!) then please don’t panic or be impatient. This is new territory for everyone, so enjoy the ride as much as you can :)

RELEASE INFO

Cydia source: http://apt9.yellowsn0w.com/ Installer repo: http://i.yellowsn0w.com/

UPDATES

Soon you’ll see yellowsn0w 0.9.1 in the repos. It uses a much longer delay to let your SIM card initialize. If you have problems with 0.9.0, try this one and wait a full minute after you see homescreen, then reinsert sim card. We need both success and failure reports to tune this across the world, so please be patient (but please also report result!) If you are in the U.S. and are trying this with T-Mobile, you must turn off the 3G switch in Settings. Also if you are good with the command line, you can make it much easier by adding the line <string>-q</string> right after the /usr/bin/yellowsn0w line in /System/Library/LaunchDaemons/org.iphone-dev.yellowsn0w.plist (that’s and advanced tip, hopefully someone will make a boosprefs type of tool for it) No PIN support yet. Remember how we said this was beta? Well we’re still working out the flow for SIMs with PINs enabled. Please disable any PIN you may have on that SIM before trying yellowsn0w, for now. The unlock will silently quit on anything other than baseband 02.28.00. It detects the wrong version and just quits to avoid any damage. Please double check your Modem Firmware setting in Settings->General->About.