How to Jailbreak Your iPhone 4 Using PwnageTool (Mac) [4.2.1]

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Posted February 15, 2011 at 7:52pm by iClarified

These are instructions on how to jailbreak your iPhone 4 on iOS 4.2.1 using PwnageTool for Mac.

Step One
Make a folder called "Pwnage" on the desktop. In it, you will need a couple of things. PwnageTool 4.2, found here or here.

You will also need the 4.2.1 iPhone firmware.
4.2.1 (4): iPhone3,1_4.2.1_8C148_Restore.ipsw

When downloading the IPSW file, it is best to download it with Firefox since Safari often auto extracts it!

How to Jailbreak Your iPhone 4 Using PwnageTool (Mac) [4.2.1]

Step Two
Double click to mount PwnageTool then drag the PwnageTool icon into the Pwnage folder.

Then from the Pwnage folder double click to launch the PwnageTool application.

Click Ok if presented with a warning.

Step Three
Click to select Expert Mode from the top menu bar

Step Four
Click to select your device. A check-mark will appear over the image of the device. Click the blue arrow button to continue.

Step Five
You will be brought to the "Browse for IPSW" page. Click the Browse for IPSW... button.

From the popup window select your firmware from the Pwnage folder then click the Open button.

Step Six
You will then be brought to a menu with several choices. Click to select General then click the blue arrow button.

The General settings allows you to decide the partition size. Check Activate the phone if you are not with an official carrier then click the blue arrow button.

NOTE*: Deselect Activate if you have an iPhone legitimately activated on an official carrier.

The Cydia settings menu allows you to create custom packages so you do not have to manually install the necessary them later.

Click to select the Download packages tab. Then click the Refresh button to display all the available packages. Double clicking the package you want will download it and make it available in the Select Packages tab.

Checkmark the ones you want then click the blue arrow button.

The Custom Packages Settings menu displays listed package settings for your custom IPSW. For know leave these settings as is. Click the blue arrow button to continue.

Step Seven
You are now ready to begin the pwnage process! Click the Build button to select it then click the Blue arrow button to begin.

Step Eight
You will be asked to save your custom .ipsw file. Save it to your Pwnage folder you created on your Desktop.

Your IPSW is now being built. Please allow up to 10 minutes.

You will be asked to enter your administrator password. Do this then click the OK button.

Step Nine
Once your ipsw has been built you will be asked to connect your iPhone to the computer. Once it detects your device PwnageTool will guide your through the steps to putting your iPhone into DFU mode.

Press and hold the power and home buttons for 10 seconds.

Then release the power button and continue holding the home button for 10 seconds.

Once your iPhone is successfully in DFU mode, PwnageTool will prompt you to launch iTunes.

Step Ten
Once In iTunes, hold the Alt/Option key and click Restore.

Step Eleven
Navigate to the Pwnage folder on your desktop using the dialog window that appears. Select the custom IPSW that was created and click the Choose button.

Step Twelve
iTunes will now restore the firmware on your iPhone. This can also take up to 10 minutes. Once done you will be rebooted into jailbroken iOS 4.2.1!

***THANKS: Thank you to Geohot and the Dev-Teams for their hard work in making this jailbreak and tutorial possible!

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yavy - March 23, 2011 at 6:20am

guys. i was using iphone 4 (factory unlocked) which i upgraded to OS 4.3 then i used pwnage tool to jailbreak it and downgrade it to os 4.2.1 but now i am unable to use my i phone. my iphone is stuk on restore mode and only displaying itunes and a cable on the screen. !! what to do to restore it ? can any1 help me plz ?

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kompuntu - March 12, 2011 at 9:37pm

I keep trying to do this and every time the process gets stuck in iTunes when its trying to verify the upgrade with Apple. Then it says it can't do that. I tried to sign out and back in to my iTunes account and now i get another messages: this device is not eligible for this build. WTF??? I have a jailbroken iPhone 4 with 4.1 firmware. Did it before with PwnageTool on MAC. No idea what is wrong with this as i've done this since OS 2.0... Any ideas? Anyone?

Helper - March 15, 2011 at 7:28am

You need to add : 74.208.105.171 gs.apple.com to your hosts file. And then try to use iTunes again(restore custom). Apple has stopped signing 4.2.1

kompuntu - March 16, 2011 at 11:43am

Thanks for your reply! Just so I understand: i don't actually have to already be at 4.2.1 in order to restore to a custom 4.2.1, right? Someone told me that its failing because of that. Because I'm currently at 4.1. Is this right? I don't need to already be at 4.2.1? If i add this entry to my hosts file - the restore should work?

mutesi - April 1, 2011 at 7:51pm

Hi Helper. For us non technical folk can you please describe how to "add : 74.208.105.171 gs.apple.com to your hosts". I am having the same problem as kompuntu. Thanks!

e-master - July 20, 2011 at 5:39am

@Helper I added the 74.208.105.171 gs.apple.com to my hosts file, and still getting the same error "the iphone ***** could not be restored. this device isn't eligible for the requested build" Any other sugestions?

sankalp arora - March 5, 2011 at 4:20am

My cydia doesnt open what to do now

Shasudi - March 5, 2011 at 7:11am

Install Cydia from custom package

kristianto - March 3, 2011 at 5:43am

JB W/ Pwnage success, just wait for Unlock bb 031010, make it faster bossss my iphone4 still at IPOD MODE ^_^

Shasudi - March 4, 2011 at 2:06am

Select activate the phone option in General (Pwnage Tool)

kristianto - March 4, 2011 at 11:32am

thank shasudi, but I Little bit afraid, is it really work if I select the active the phone? because i don't know my Iphone is FU or SU, how to check the different?

Marcelo - March 11, 2011 at 9:48am

I checked the "Activate iPhone" option, but it is still locked...

Marcelo P - March 2, 2011 at 5:23pm

After JB, the iphone is still locked.. How to unlock it - iPhone 4 - 4.2.1 - Baseband 02.10.04? Thanks in advance !!!

jthunder - February 22, 2011 at 8:11pm

Iphone4 ios 4.2.1, with fw 2.10.04. JB using PwnageTool 4.2 but Cydia does not work. It quits before it can even execute. Any fix for this ??

makokis - February 24, 2011 at 10:50am

same as you with firmware/baseband 03.10.01... do no works¡ :( Any help please?

AdamThePizzaMan - February 24, 2011 at 3:50pm

Run redsn0w and Select "install cydia" and make sure it's the only box checked. No need to restore or anything, just run the latest redsn0w and when it asks you to select a firmware file, make sure you point it to your STOCK 4.2.1 firmware file. @adamthepizzaman

taterho - February 24, 2011 at 8:48pm

I had the same problem with cydia not opening i just re-jailbroke and made certain i followed the instructions and it worked...AT&T iphone 4 w/4.2.1

Shasudi - March 4, 2011 at 2:04am

Install Cydia from custom packages and not from General in Pwnage Tool

kristianto - February 22, 2011 at 4:09am

why if I already jailbreak with redsnow, is any problem if I jailbreak again with pwnage tool?

bloodyfool0 - February 20, 2011 at 11:15pm

Worked just fine for me. Thank you iClarified for the very clear instructions. I would like to add that you should backup your data in iTunes before JB. After JB, restore the data you backed up in iTunes. I needed to do that to put all the files/musc/contacts back into the iPhone.

pinguinpetzi - February 19, 2011 at 9:12am

Hi, I haver jailbreak iPhone 4 to 4.2.1 with Pwnagetool 4.2. Now I can´t sync my Apps to the iPhone. How can help me ? Thanks pinguinpetzi

dudebob - February 18, 2011 at 4:49pm

My iphone is stuck towards the end of the restore...it has been 30 minutes. How long should I wait? What is the fix? Thanks

Mike Estrada - February 17, 2011 at 10:10pm

I tried this and after the installation completed, my phone part of my iphone 4 did not work. Any solution?

Adam Jungers - February 17, 2011 at 11:55pm

Mike my phone is having the same issue. no phone or wifi its like my phone is now an ipod

Mike Estrada - February 18, 2011 at 12:10am

I hear u... My WiFi worked but not the phone part. I did it twice to make sure I didnt select iPod... Still same problem.

bm - February 17, 2011 at 8:35am

my signal bars have dropped significantly after using this pwnage 4.2. i originally used the greenpois0n jailbreak to get to ios 4.2 but i wanted the ibooks fix so used pwnage 4.2. my signal bars went from 5 bars to 1 and sometimes it goes to 'no service'. to make sure that it wasn't just my sim/account that is having trouble, i put my sim into my wife's iphone 4 (jailbroken with greenpois0n on ios 4.2) and the signal bars went up to 5 bars. i put her sim into my phone and the signal bars went down to 1 bar and sometimes to 'no signal'. i switched bak the sims and sure enough, on my phone the bars completely dropped to 'no signal'. anyone else with the same problem?

rabta69 - February 17, 2011 at 9:08am

Switch of 3G and see

bm - February 17, 2011 at 10:00am

i did not have 3g on. i've gone back to greenpois0n jailbreak. better a broken 'ibooks' rather than a phone with no signal. signal is now fine. 5 full bars!!!

ene - February 27, 2011 at 3:37pm

I had the same issue with the signal... oh well!

paliboy - February 16, 2011 at 6:07pm

ok everything worked perfect...after jailbreaking it to 4.2.1 i got the unlock to work for tmobile and the mms but my internet network doesnt work or my facetime....can anyone help please

nsc - February 17, 2011 at 7:35am

I Have the same problem. Can you help me ? Many thanks

paliboy - February 17, 2011 at 4:16pm

ya put internet2.voicestream.com on the apn on cellular data

Ecua4ever - February 16, 2011 at 2:59pm

THANK YOU DEAV-TEAM AND ICLARIFIED I PERSONALLY LOVE PWNAGE TOOL SINCE FIRST IPHONE 2G THANKS FOR UPDATE

Ecua4ever - February 16, 2011 at 2:48pm

Please I need help I just update my iPhone 4 without upgrade my baseband but now I don't have face time any solutions???

Matt - February 16, 2011 at 11:49am

Just to clarify, if I want to jailbreak my iPhone 4 but do NOT want to unlock, I need to deslect activate in step six?

4ever - February 16, 2011 at 2:42pm

If you an official carrier uncheck the box

krazyK6 - February 24, 2011 at 3:18pm

What if you are with ATT but want the option of having an unlocked phone in case you travel overseas... Is it ok to select "Activate" in step six?

anthony - February 16, 2011 at 10:59am

after restore with itunes i have cydia but when i press to launch it but it will not start it close right away. i have an iphone 4 and used mac. can some one help me? thanx

Renato - February 16, 2011 at 8:28am

I've tried on a iPhone 4 baseband 03.10.01. Until now not woking Cydia and did not recognize an unofficial carrier.

Ecua4ever - February 16, 2011 at 2:52pm

My friend you have to uncheck deselect the box an step six and continue

Armin - February 16, 2011 at 1:46am

Hi, I wonder that should my iPhone 3GS be jaillbroken already or there is no difference?

Venkat - February 16, 2011 at 1:05am

How to Jailbreak and unlock your iPhone 3Gs Using Sn0wbreeze 2.2 (PwnageTool for Windows) by Creating iOS 4.2.1 Custom Firmware - with out 1600 errors ... my phone: 4.0.1 , 05.13.04 BB on Win7, x64 host: ** I have not seen icons on the SB and iREB applications. I just followed looking at corresponding screen shots - may be my host problem, 1. Download Sn0wbreeze 2.2 for Windows 2. extract sn0wbreeze-2.2-final.zip to any dir. 3. Download iOS4.2.1 for 3Gs: http://appldnld.apple.com/iPhone4/061-9895.20101122.Cdew2/iPhone2,1_4.2.1_8C148a_Restore.ipsw 4 launch snowbreeze and in the second step select ipsw file 5. Select SImple mode and click blue button - will take some time and it says custom ipsw is created on ur desktop. ** I have followed the next steps promted by SB nut i alyws got 1006 error, so below are the steps that worked for me. 6. exit sonow breeze. 7. download iREB http://ih8sn0w.com/index.php/download/file/ireb/pc 8. Put the phone in DFU mode. there is a nice video in iClarified.com - i just followed it. 9. plug in iphone and laiunch iREB. 10. Click on 3GS button on iREB. it does something ... like puttining down limerain .. dont worry.. 11. launch itunes, while iREB is still running ... itwill tell you to restore the phone. 12. use shift+resotre button to pick up the custom FW that was created in step 5. *** I have not seen any error .. just went fine. restore sucess keeping my BB intact. 13. install ultrasn0w from Cydia.

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