How to Jailbreak and Unlock Your iPhone 3G Using RedSn0w (Mac) [4.2.1]
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For those users that are planning to Jailbreak on iOS 4.2.1 then I highly recommend adding this Cydia Source into Cydia after you jailbreak so you don't have to manually input all the Cydia Sources manually. This will automatically add all the best Cydia Sources and give you access to all the best Cydia Tweaks, Themes and Apps for FREE with just a push of a button. Follow the steps below. 1. Open Cydia 2. Tap Sources 3. Tap Edit 4. Tap Add 5. Type this url in the box (cydiasource,n e t) without the spaces and switch coma for a dot in the url. 6. Tap "Add Source" 7. Install the package labelled "All Sources". This will give you all the best Cydia Sources to have access to all the best Tweaks, Apps and Themes for FREE.

TNX TNX TNX TNX TNX ;XXXXXXXXXXXX

I did all this and it worked perfectly on my iPhone 3g until it refused to show my sim network. The phone was originally locked to telstra then unlocked properly and I still have a telstra sim. But it only shows 1 bar with no data network like it normally does. I have it in a place where I would normally get 5 bar full reception and I still have only 1 bar. Removing and re-inserting sim does not work, it just shows "no sim". Anyone able to help??

baby scratch

Link for redsnow is broken :(

On an iPhone 3G, Is it possible to upgrade to a higher firmware than 4.2.1 once you have gone to a baseband of 06.15.00?

Thank You so much! I've been wanting to jailbreak my iPhone 3G for a very pong time and I tried using other softwares but I couldn't. This helped a lot. Thanks

The "install ipad baseband" is nowhere to be seen

I did this and it all worked, but the phone is saying sim card failure, but the sim card works in another unlocked phone, any ideas what to try next?

THANK YOU SOOOOO MUCH!!!!!!!!!!!!!!!!

this worked better for me. http://www.techsliver.com/2010/11/29/unlock-guide-iphone-3gs-3g-pwnagetool-413-unlock-edition/

this didn't work for me. my phone is stuck with an apple logo and the spinning wheel (stopped) on the screen. i tried holding down the power for quite some time but nothing happened

if i hold down power & home the phone will shut off, but i cannot get it back into DFU mode. if i let it sit it just freezes again.

i had to have itunes open before it would detect and restore it. restoring the official firmware now and will try again. what a PITA. not sure what went wrong because the guides here have always been flawless...

after freshly restoring to 4.2.1 i tried jailbreaking again. again didn't work. everything seemed fine and i saw the pineapple logo but after reboot it just freezes. i waited way longer than 5 mins. going to drop it for now and let my comments stew for a few days. write back if you have any suggestions.

no responses? so i tried jailbreaking with PwnageTool, worked perfectly

Hi, Thanks for the extensive post. I am having a iPhone 3G with 4.2.1. I want to know whether running this jailbreak will wipe my data or not? Also if I want to revert to factory settings, will I be able to do that after jailbreaking? How to do the same, any links. Look forward to the above two answers. Thanks.

It did erase all my data, and at the end of the day, it did not work. After a couple of attempts, it just stays in the reboot screen!

Monumental guys! Dev-Team u r my heroes! This is incredible good job! ;)

May 27, 2011 Here is how I finally did it. For a 3G 4.2.1 with baseband 05.15.04 How to Jailbreak and Unlock Your iPhone 3G Using RedSn0w (Mac 0.9.6rc17) [4.2.1]. Jailbreak opens the phone so you can install non-apple software. You will use Cydia to install a program in the unlock phase. I couldn't follow the directions as written. Instead I had to use RedSn0w in a 3 step process rather than the 1step described. Instructions at: https://iclarified.com/12947. Following the instructions always resulted in the program turning off in the last phase before downloading the changes and restarting the phone. How I modified the instructions and got it too work. First use RedSn0w to boot tethered. Second use RedSn0w to add Cydia. Third use RedSn0w to change the baseband to the iPad 06.15 version (this has significant implications make sure you understand them first). After the jailbreak you have to unlock your phone. How to Unlock the iPhone 4, 3GS, 3G Using UltraSn0w Unlock uses a program you download to your phone from Cydia called UltraSn0w. Instructions at: https://iclarified.com/4253

This article states that if you have firmware 4.2.1 and you install the 6.15.00 iPad BaseBand that "you won’t ever be able to restore to stock firmware (it will fail)." This is in fact not true. Perhaps at the time of writing, but it is now possible to restore to stock firmwares, however I advise against it, you should always use compatible custom.ipsw firmwares.

I havea 3G, everything worked and had it unlocked....someone updated it on itunes and now its stuck on connect to itunes......i tried to jailbreeak and unlcok again but after the pineapple shows and does its thing it goes to apple then to connect to itunes....NOW what??? Can i correct this? thanks

Hi! I'm on a jailbroken iPhone 3G 4.0.1 (8A306), baseband 05.13.04. If I want to jailbreak and unlock it to 4.2.1, how should I do it? With the iPad baseband or not? Thanks in advance!

I've Updated my iPhone 3G to 4.2.1 Baseband 6.15 and trying Jailbreak with RedSn0w and it doesn't work on Mac OSX 10.5. Please guide me.

Mine is taking too long in step 11... did you guys took too long as well... about 5 mins fething the iPad data and then it's still sutck in waiting for reboot for the past 10 mins or so.... not sure what to do... any ideas????

I've got it done! Had to cancle my first attempt that was taking too long and tried again... the second time it worked well....

great it worked, first try did not work cos i did not select the “Install iPad baseband”. but go through everything again it worked brilliant thanks for the dev team guys' hard work and detailed instructions all the best

hey why didn`t work at first? what was the probelm? I want to know if it`s the same I`m having thanks

Hey I found a fairly easier way for this one. This website www.pwnageme.com is really helpful. It successfully JB and unlocked my iPhone 3G.

I went to that site. It asks "Activation yes/no". Can you advise what that means?

Yes, that is asking if you want to hacktivate your iPhone or not. So if you hacktivate you wont need an AT&T SIM and connect it to iTunes. It will already be done when your iPhone boots In my case I need to activate because I am not an AT&T user, I bought my iPhone from eBay.

WRONG LINK. In article there is link to redsn0w 0.9.6b4 not 0.9.6b5, so grab it here instead: http://iphoneroot.com/iphone-dev-team-releases-redsn0w-0-9-6b5-for-unlockers/print/

Do eney body cnown if resenär support iPad whit 4.2.1 i only wanto jailbreak // Sorry about My spelning i'm Dyslectik //

I hv an iphone 3G 8 GBI upgraded to 4.2.1 using redsn0w and the firmware provided here. Post which I unlocked with ultrasn0w last night. Now my battery drainage has gone up drastically. It's going to 0 in 2-3 hours. NEE URGENT HELP.

Is this jailbreak tethered or untethered?

Please help me I install the new ios 4.2.1 and I flow all the steps and sucsess but the problem with ultrasn0w not work what should I do please thank you

Read what the text says: DO NOT UPDATE IF YOU RELY ON CARRIER UNLOCK. Wait until Ultrasn0w is fixed. You can jailbreak now, but you CANNOT UNLOCK yet.

Why I need to save shsh blobs ? I have 3G locked with 05.14.02 should I follow this tutorial or I need to wait for version with using saved blobs?

Okay, I can follow these steps. In fact i have followed them before when i originally jailbroke my 3G - which leads to my question: I have a 3G, jailbroken and unlocked (I am not reliant on unlock but have used it when I travel - I can therefore jailbreak at 4.2 and wait patiently for an unlock) 4.0 ios, bb 5.13.04, my shsh blobs are saved up to 4.01 on Cydia So do I upgrade to 4.2 prior to following these steps? If yes, should I choose the "restore" tab? In which case will I lose all my app settings? (i lost them all the last time I did this) Many thanks for your expertise and clear instructions Sue

I am using an iPhone 3g currently running 3.1.3 jailbroken and sim unlocked. Do I use this process if I want to upgrade to 4.2.1? Do I select the 4.2.1 firmware?

Hi Friend, You should make sure to read the iphone dev team blog (google it) thoroughly --which gives latest information regarding (and links to) jailbreaks and unlocking tools for every version of firmware and hardware and ios. As I type this (Nov 24, 5PM PST) the sim unlock tool is not yet available for jailbroken 4.2 - however the JB is available and the instructions above are how to do it. They are working on the unlock tool and apparently it looks promising (but if you need the unlock - do NOT upgrade to 4.2 until that unlock is available)

That's very useful, thanks.