How to Jailbreak iOS 4.0 on iPhone 3G with Redsn0w 0.9.5 Beta 5

Finally long wait of iPhone OS 3.1.3 & iOS 4.0 jailbreak & unlock is over as iPhone Dev team has released both Ultrasn0w 0.93 unlock tool & Redsn0w 0.9.5 Beta 5 jailbreak tool for iOS 4.0. Fortunately the tools were released immediately after iOS 4.0 went live.

We have already covered how to unlock iPhone 3GS/3GS 4.0 with Ultrasn0w 0.93 and now here is our guide on how to jailbreak iOS 4.0 final on iPhone 3G.

Please note: Redsn0w 0.9.5 Beta 5 is still in beta mode so you’ll need to let Cydia reorganize, reload, and update after using redsn0w.

How to Jailbreak iPhone 3G 4.0 with Redsn0w 0.9.5 Beta 5

1. Download iOS 4.0 for iPhone 3G

2. Download iTunes 9.2

3. Download Redsn0w 0.9.5 Beta 5

4. Now follow our guide to manually update iOS 4.0 on iPhone 3G

5. Once you have updated iPhone 3G to iOS 4.0 start Redsn0w 0.9.5 Beta 5.

6. Click on Browse button and select iPhone 3G 4.0 firmware (iPhone1,2_4.0_8A293_Restore.ipsw) downloaded in step 1

7. Now click next and Redsn0w 0.9.5 Beta 5 will prepare data for jailbreak.

8. Now select “Install Cydia” and click Next. (If you want to disable multitasking & wallpaper then simple uncheck respective options).

9. Now You will need to power off your iPhone 3G and connected to computer  only then click on next button of Redsn0w 0.9.5 Beta 5.

10. At this stage you will need to put your iPhone in DFU mode, to do this hold “Power” button and then while holding the “Power” button, you will now have to hold “Home” button too for about 10 seconds. Now after few seconds release “Power” button but keep holding “Home” button until installation begins (about 30 seconds).

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11. Now just wait until Redsn0w completes the rest of the process. Once done, your iPhone 3G will restart automatically and you will find it jailbroken with iPhone firmware version 4.0.


12. If you want to unlock iPhone 3G 4.0 then follow our guide on How to Unlock iOS 4.0.


iPhone 3GS users can now jailbreak iOS 4.0 on iPhone 3GS with Pwnagetool 4.0.1 & jailbreak iPhone 3GS 4.0 with Sn0wbreeze 1.7 on Windows only if you have old bootrom, here is how to check iPhone 3GS bootrom, new bootrom users can check out how to jailbreak iPhone 3GS 4.0 New bootrom.



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37 thoughts on “How to Jailbreak iOS 4.0 on iPhone 3G with Redsn0w 0.9.5 Beta 5”

  1. Is this still aimed at develpers of jailbroken apps or can anyone just jailbreak an ios4 3g iphone with this?



  3. Thanks .. it worked perfect for me ….but after jailbreaking when i insert my vodafone or Airtel SIM card … it says no service .. why it is not accepting any sim card .. I have to unlock it as well with cedia .. but without SIM card how can I install ultrasnow from cedia ?? plz help ..

  4. Did everything you indicated but when I go to browse and select ipsw file download previously (IPhone1,2_4.0_8A293_restore.ipsw, I get an error message “Unable to recognize specified IPSW”. I tried this several times and get the same error message. What am I doing wrong. I have an IPhone 3G and my computer is a MAC OS X. Help!!!! Thanks in advance.

  5. i just jailbroke my iphone 3gs 4.0 i updated to 4.0 with itunes and then i downgraded to 3.1.2 then resotred with 4.o custom firmware and now im running 4.0 jailbroked and unlocked with tmobile

  6. yeah just like dominic i received the same error msg and i have win 7 by the way ..what are we doing wrong!!!!!!!!

  7. well i have heard that it is possible through clawpack but it’s not free…..
    can u help me where to find the solution

  8. I didnt have to jailbreak my Iphone before this is it giong to cause a problem
    I really need help i can’t use it

    Reply anyone

  9. Love you guys!!!!!!!!!!!!!! My iphone 3g is jailbroken and unlocked!!!! Thanks to you!!!! “Unable to recognize specified IPSW” If you get this message you have got wrong version of redsn0w!!! I am using redsn0w_win_0.9.5b5-4 and it works. Here is a download link:

  10. ok so i downloaded the ios 4.0 for 3g but when i try to download Redsn0w 0.9.5 Beta 5, google pops up and says page not found what should i do??? somebody please write back

  11. I tested redsn0w with iphone firmware 4.0
    on the iPhone 3G and 3GS

    1. IPhone 3G (firmware 4.0)
    iPhone 3G WORKS with redsn0w and unlocks / jailbreaks great.
    I even loaded Tethering that works from

    2. iPhone 3GS (firmware 4.0)
    DOES NOT WORK. Redsn0w cannot recognize the IPSW file.

    I got my iPad for $39 bucks at guys. This is for real.

  12. Thanks guys. I was able to successfully jailbreak and unlock my 3G phone. It was pretty straight forward. Thanks again.

  13. I did everything mentioned above but when i jailbreak its stuck on “uploading Ramdisk” what am i doing wrong?

  14. Tried below and still no joy :(

    Written By In My Bumon July 2nd, 2010Love you guys!!!!!!!!!!!!!! My iphone 3g is jailbroken and unlocked!!!! Thanks to you!!!! “Unable to recognize specified IPSW” If you get this message you have got wrong version of redsn0w!!! I am using redsn0w_win_0.9.5b5-4 and it works. Here is a download link:

  15. I was trying to jailbreak through redsn0w, the prcoess kept me waiting for long time at ‘waiting for reboot’ no sign of completion. Actually I updated my iphone 3g to OS4 through itunes automatically not through manual as I cannot find the ‘update’ button to select iPhone1,2_4.0_8A293_Restore.ipsw.

  16. I’m using the other version of redsn0w; redsn0w_win_0.9.5b5-4 as suggested earlier and just like ‘M’ I haven’t had any luck at all, I cannot use my phone at all cus it doesn’t support my SIM card, please help as soon as possible !

  17. Thank you SO much! I had trouble getting redsnow to work after updating my 3G to OS 4.0 so I went back to OS3.0 and used redsn0w 9.2 with baseband 05.13.04 and it worked.

  18. i have an iPhone 3G 16GB, to update it to OS 4.0 and jailbreak i used (redsn0w_win_0.9.5b5-5) and successfully uploaded (iPhone1,2_4.0_8A293_Restore.ipsw)to with phone and it displayed downloading jailbreak data. After few minutes it restarted but still the phone is not jailbreaked as it still displays emergency call screen only.

    Any ideas wht went wrong, though i got no errors and things went smooth unless when it reboot it still shows the same old emergency call screen :(

  19. I tried to upgrade my jailbreak from firmware 3.1.2 to version 4.0 on my iphone 3G. I used Redsn0w 0.9.5beta.
    I downloaed ispw file for iphone 3g with firmware 4.0. Tried to jailbreak it. Everything seemed worked. After iphone re-boot, when I checked my phone, it was still on firmware 3.1.2.
    Please advise.

  20. Sorry , but I have a big issue
    Every step from jailbreak with Redsn0w 0.9.5b5-5 seems to work properly , the iphone is re-booting after finalize , Cydia icon is displayed , only that my icon for Phone is disappearing (so I can not dial even I have Orange 3G signal bar, and the IPhone is ringing ) , and also internet connection is not working (not WiFi neither 3G), even the screen shows that the connection exists (Wi Fi or 3G bars are displayed , and the round sign shows intention for connection , but not really data transfer).
    So I could not go ahead , being impossible to update Cydia
    Have someone else got same issue? Where the mistake is.
    I double checked out – IOS4.0 is the correct one , Iphone is 3G , Model MB

  21. HI Saeed Ahmed, Same problem to me also. Slide to Emergency only coming. After then wat u did for rectifying this problem. Please tell me.

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