If you try to downgrade your iPhone 3GS to any version from 4.2.1 all the way to 4.3.5, you will get error 1015 and tinyumbrella wont work.  This is because every time you update your iPhone, iTunes automatically updates the baseband.  When you try to downgrade it, iTunes tries to update the baseband but is unable to because your baseband is higher since it was already updated in the past and you’re trying to go back to a lower baseband which is not possible.  You can skip the baseband update by following the step-by-step video below.





Download Links:
Fix Recovery (Windows) - Make sure to use Fixrecovery43 NOT Fixrecovery421

Fix Recovery (Mac) - Make sure to use Fixrecovery43 NOT Fixrecovery421

Zlib1.dll - Make sure to place this in the same location as Fixrecovery43

——————-

Note, if you get the infamous error 60000ms, go to this guide to figure out how to fix it.

How to fix error 60000ms guide


 

73 Responses to “How to: Fix Error 1015 when downgrading iPhone 3GS to 4.2.1-4.3.5”

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  4. houston says:

    my phone just shows a white screen what should i do? the code starts to run but then on the command line it says waiting for device to pop up????

  5. andres says:

    todo bn

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  11. Raven says:

    After ive done the second power off i don’t see the color change to white and it green poison doesn’t start writing. What would the problem be?

  12. Queria saber URGENTEMENTE se esse tuto funciona também em Iphone 3g pois chegou um aqui pra mim com esse problema e ainda nao sei sera que da pra responder ou aqui ou no meu e-mail pedrophdelmondes@gmail.com. Obrigado

  13. URGENTLY wanted to know if this status also works on Iphone 3g it came to me one here with this problem and still do not know what will be the answer to either here or in my e-mail pedrophdelmondes@gmail.com. thank you

  14. flavius says:

    and ur gps will be fixed after u step out of that 1015 error or still will be problems with finding gps signals?

  15. tinman2712 says:

    hi i cant get my iphone 3g into dfu mode iv tryed ti loads of times?

  16. michael says:

    Hey i did all of that and my iPhone 4 restarted and still stuck on the itunes logo again

  17. priscilla says:

    after i hold the pwr and home button (for the firs time) and after it shuts off (for the first time) i release the home button but it won’t turn back on?!

  18. You really make it seem so easy with your presentation but I find this topic to be really something that I think I would never understand. It seems too complicated and very broad for me. I am looking forward for your next post, I’ll try to get the hang of it!

  19. Milan Witter says:

    I was suggested this blog by my cousin. I’m not sure whether this post is written by him as no one else know such detailed about my problem. You are incredible! Thanks!

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  23. Cynthia M says:

    Hey Ian – tried to follow all these steps, however the command prompt window closes very soon after starting, and I’m back to square one. Any ideas? I’m running Win 7 64bit, and an iphone 3gs. Thanks.

  24. Bry says:

    fixrecovery43 exits after my iPhone enters DFU mode, help would be very much appreciated.

  25. ajay says:

    please help me my iphone 3G is showing error of 1050 whatshould i do?? rply me as soon as poosible

  26. ajay says:

    please help me my iphone 3G is showing error of 1015 whatshould i do?? rply me as soon as possible :(

  27. Bobby says:

    Mine does the same thing as it does for Bry. fixrecovery43 exits after my iPhone enters DFU mode, help would be very much appreciated

  28. Elizabeth says:

    I have the same problem as Bry and Bobby…please help!

  29. Stephanie says:

    I get to the window with the black screen and I hold the buttons let go etc… but the black window isnt filling up a whole list of lettering like yours… help me please :(

  30. me says:

    the thing is..
    Sorry device is not compatible with this jailbreak
    Exitin libpois0n

    Damn i had to try this million times till i got the printscren right time to get the error becoz it closes jus after this mesage, like 0.01s and gone
    any ides?

  31. unknown says:

    I followed all the instruction, yet the black box closed on me.
    i tryed it a second time but nothing showed up on the black box.
    please help.

  32. walter says:

    my phone has been stuck on this white screen for 5 minutes

  33. halominko says:

    What if I have Tmobile?… will this way still work with my iphone 3?

  34. Gregory says:

    so I get the phone in to the DFU mode then as it starts the reading in the fixrecovery 43 mode ….the fixrecovery screen disappears and will not stay open
    and it only goes for 5 pluse lines and the off no can read ???HELP

  35. babu says:

    my phone not yet enter in dfu mode how can i solve dis problem???
    no change on waiitng for device to enter DFU mode.
    plz help me as soon as possible

  36. Daniel Issel says:

    Hi man this fix isnt working for me, fixrecovery closes once my iphone is in DFU mode. am i doing something wrong? whhat should i do?

  37. Sureshkumar says:

    hey Thanks buddy you fixed my phone…
    now it show only emergency calls.. I guess it needs to unlock
    thnx a lot..
    good job

  38. shivam says:

    as i click properties on fire recovery 43 i dont get any security option to unblock

  39. arbaaz says:

    i had restore my phone many time how u told even tho its nt working plz help ma
    and its showing error 1015

  40. anominous says:

    ive held all the buttons but still no writting!!! help

  41. mayank says:

    i m nt getting that band….. plzzzzz help me fst…..

  42. Musa says:

    Hi will this work with error code 1656? also will this work through a windows XP OS? Thanks,

  43. Nagesh says:

    Hi,

    i have a iphone 3gs on 4.2.1 with ipad baseband 6.15.00. i tried updating to 5.1.1 with redsn0w and successfully upgraded and jailbroken and unlocked with ultrasnow. after that i installed redracoon 5.1.1 for unteethered jail break. Still i could not switch with out redsn0w. also i observed that after some time, the iphone automatically switched off as soon as it entered into sleep mode. I had to connect to redsnow again and again to start the iphone. after that i tried to downgrade from ipad baseband option in redsn0w to downgrade from 6.15.00 to 05.13.04.
    Now my iphone is shows blank screen and never turns on. When reboot from redsn0w, it shows white screen then bright white screen for few minutes and goes back to black screen.

    I tried updating to NO_BB ipsw using redsnow, but i get a 28 error.

    please help me.

    thanks in advance
    Nagesh

  44. Nagesh says:

    small correction

    I tried updating to NO_BB ipsw using itunes, but i get a 28 error.

  45. Maria says:

    phone is frozen on “unable to mount user filesystem!” after using fixrecovery 43.
    what should i do?

  46. val says:

    will this work 4 an iphone 4?! i have the same situation on my iphone4. plz help!

  47. yadira says:

    i did what you sad and it didnt work………….so what can i do next..thanks

  48. Sheraz says:

    I did not get the line when its off after the all buttones process and my phone is 3g do tell me plz i am worried this is my lovly phone thanks

  49. Erosfaus says:

    hi, i tried this steps with iphone 3gs on 4.1 ios (error 1050), so dont work with my iphone :)
    maybe because this steps only work on 4.2.1 and 4.3.3, well ,if other like me have the same problem,read this steps to fix your iphone:

    1-download redsnow 0.9.14b2
    1.1- download iPhone2,1_4.1_8B117_Restore.ipsw
    2-open redsnow 0.9.14b2 on mode administrator
    3-Click extras
    4-Select IPSW (manually specify an IPSW)
    5-Select from your computer iPhone2,1_4.1_8B117_Restore.ipsw
    6-Select Jailbreak
    7-Follow the steps to DFU mode
    5- wait, since 5 minutes to 15 minutes
    6-Your iphone is jailbreak

    Note: Be care with your baseband ipad.

    my email is fausto1mayo@gmail.com, for a question*

    • Erosfaus says:

      hi, i tried this steps with iphone 3gs baseband ipad, newbootrom on 4.1 ios (error 1015), so dont work with my iphone :)
      maybe because this steps only work on 4.2.1 and 4.3.3, well ,if other like me have the same problem,read this steps to fix your iphone:

      1-download redsnow 0.9.14b2
      1.1- download iPhone2,1_4.1_8B117_Restore.ipsw
      2-open redsnow 0.9.14b2 on mode administrator
      3-Click extras
      4-Select IPSW (manually specify an IPSW)
      5-Select from your computer iPhone2,1_4.1_8B117_Restore.ipsw
      6-Select Jailbreak
      7-Follow the steps to DFU mode
      5- wait, since 5 minutes to 15 minutes
      6-Your iphone is jailbreak

      Note: Be care with your baseband ipad.

      my email is fausto1mayo@gmail.com, for a question*

  50. Frank says:

    iam not downgrading but iam restoring from jailbreak what should i do?

  51. maria says:

    i have the following problem..the Zlib1.dll you put there is for windows..does not work in my mac..
    I have not been able to find that file for mac online?? any suggestions???
    thansk

  52. Jose says:

    Your video for the Iphone 3gs is very well done. I just cannot get my phone to go into UDF mode. it just goes straight into recovery mode. Do you have any other suggestions?

    Thank you,
    Jose >

  53. yousaf says:

    helo i have iphone 3gs 4.1 firmware 06.15.00

    and my problem is that i was restore my i phone and it says -1 error

    help me plzzzz plzzzzzzz plzzzzzzzzz

  54. Sean says:

    After I put my iPhone 3 in DFU mode, fixrecovery43.exe crashes ( fixrecovery43 window disappears ). What should I do?

  55. Sean says:

    It says that my iphone is a 1 or 2 and it not compatible with this jailbreak

  56. Hassan says:

    I did the power on off bit as it says in the video but the fixrecovery windows closed and my iPhone has gone blank and isn’t turning on

  57. charles says:

    i have a problem with my iphone3gs i upgraded my ios to ios6 and now i cant activate my fone anymore its always showing the server is temporary unavaliable when ever i try to activate what will i do i need help please

  58. ethar says:

    the line dosent apper on my iphone what should I do

  59. Bayo says:

    when i get into dfu mode fixrecovery43 shuts down, why is that

  60. erwin says:

    how come i don’t see the white line the second time the iPhone is turned off???

  61. titus says:

    kindly help me out on the error 1015 iphone 3G please.

  62. yomy says:

    this is not exactly happening to my device, what should i do ?????

  63. Marian says:

    Hello my iphone was doing everithing good until the black screen with all the info got stuck in a line saying AppleBCMWLAN handleIOKitBusyWatchdogTimeout error no successful firmware download after 60000 ms!! Giving up…

  64. Victor says:

    Hi, I bought a 3g iphone long agon was unlocked and jailbroken. When i got to itunes it gave me an error and got stuck on recovery with the slide and emergency call only. I used ireb,tinyumbrella,recboot,limera etc, because the power button is stuck and this software don’t need nothing else to fix recovery but i am still stuck with emergency calls when i put my tmobile sim again it fills the signal bar but its still stuck. What can i do in this case?
    Thanks!

  65. Basil says:

    hello
    thanks a lot
    i have tried it
    and it worked
    but that sucks
    it didn’t work on my phone
    i have iphone 4
    my phone just stopped by itself
    i even had cydia
    and after 3 hours maybe
    the iphone just stopped working
    my screen was like frozen on apple icon thing screen
    and i even tried to ring on it
    and the other phone was ringing
    but nothing on my phone
    so everything on my phone is lost because im doing restoring
    so thanks for your video
    you helped people but not me

  66. Dj LexXxus says:

    Could you possibly help me with my iPhone 2g please? I have these same problems with my iPhone…. help please.

  67. elyza says:

    i can’t fix my iphone. could you pls help me? send link to me. thanks

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