This guide and tutorial will show you how to unlock your iPhone 4 running iOS 4.0.1 using UltraSnow 1.0-1. This method will not only work with the iPhone 4 but also with older models. UltraSnow 1.0-1 will unlock:

  • The iPhone 3G, iPhone 3GS, and iPhone 4
  • Basebands 01.59.00, 04.26.08, 05.11.07, 05.12.01 and 05.13.04

Note that UltraSn0w will work no matter what your iPhone model number is.

In order for UltraSn0w to work, your iPhone must be activated. If it isn’t, follow these instructions to activate your iPhone without the original SIM card.

Step 1: Jailbreak your iPhone using JailbreakMe.

Step 2: Go to Cydia and search for UltraSn0w. If it’s not there, you might have to add the following repo:

Step 3: Install UltraSn0w.

Step 4: Reboot your iPhone.

Done! Your iPhone should be unlocked. You can now pop in any SIM card. If you unlocked an iPhone 4, you might have to trim the new SIM so it fits in the tray.

Because the iPhone doesn’t support T-Mobile’s 3G frequencies, T-Mobile users in the US should turn off 3G in Settings > General > Network.

  • Satyen

    I stay in Delhi, India and I have i phone 4G 4.1 version. I have jailbreak it but could not unlock the carrier base band. Can anyone tell me when would the unlock be available for this version??? I read in one of the blog that it would be available once Sherif Hashim will make the unlock open to public, is it true????

  • Heyy , What’s up !

    Today I want to teach you how to do it using you windows 7 or lower system operational 😉
    * first of all close everything you have open! ”Especially Itunes ”
    [ You don’t actually need it now ]

    Do you have Tinyumbrella ? no ? download it ! ( the new version )

    * Open Tinyumbrella and find out which IOS you already have just to make sure !
    do you have 4.3 ? ok ! downgrade it !! how ? –>

    –> * Connect you Iphone to you computer and open Itunes
    ‘ Set your Iphone on DFU mode Holding down the Power button/Home button at the same time !

    * Your device is on DFU mode and your Itunes knows !
    after that you have to download the firmware you want to downgrade it for ( 4.2.1 or 4.1 ) if you have 4.3 running either one works 🙂

    * After downloading it open up your Itunes / hold down shift*restore and tell Itunes where is the firmware you just downloaded

    * Right now your Itunes most be loading the software/ if you have the USB message saying its too slow close everything, open Tinyumbrella and select start TSS Server.. minimize the program and open IREB do set it on DFU ! it should close your Itunes but you device is on DFU mode still [S]

    * Reopen your Itunes and try one more time =S

    * After the restore is completed you most use redsnow to jailbreak it for you
    open redsnow and select 4.1 or 4.2.1 … it will give options to select ( cydia only for now ) go next !

    * Iphone rebooting and MAC on screen / Good ,, Very veri gud!!
    God job !

    * after its done you have you Iphone unlocked but not jailbroken .. right ?
    yes !!!!!!!!!!!!!!!!!!!!! derrr

    * DFU MODE AGAIN !!!
    open redsnow with the same firmware and select install baseband and go next !

    * Are you done ? you probably don’t have cellular data network!
    you most be fucked up ! damnnn it !!!
    just kidding , Its under control ..
    go to setting and turn your air port on .. 3g off .. WI-FI on./ data off

    * Open Cydia and go to Sources , install Ultrasnow to unlock the baseband for you !
    tammdammm !!!! working !!! gud jobi . very veri gud job !

    problems with WHITE SCREEN ? take bettery out for 30 minutes and put it back on ! … try to restore and it will be fine !

    They say you can’t restore 4.3 but its not true .. beeijo ! beso .. kisses girlz !

  • Hi Everyone 🙂

    Can anyone confirm – Does Jail Breaking Iphone reduces the battery life?

  • Koliqi

    can tell me any one how to unlock IPHONE 4 4.1 bb 02.10.04

  • nitin

    anybody in need for GEVE TURBO SIM for unlocking IPHONE 4G(Versions 4.1 / 4.2.1 / 4.3 / 4.3.1 & Modem Firmware 01.59.00 / 02.10.04 / 03.10.01 / 04.10.01)…. can contact me…. it works…. just for rs.1900 [email protected]……………

  • gees

    Hey I need help badly, I currently deployed in Afghanistan and I have an iphone 3gs. I am trying to unlock it over here but Im having so much trouble. The version says 4.1(8B117) and the modem firmware says 05.14.02 is there anyway that I could unlock this phone and if so how do I do it. Pls, pls, pls help I have 9 months of the deployment left and need this phone unlocked,

  • Hi Gees,

    All you need a computer, internet connection, connecting cable and your iphone and you can get it unlocked.

    You can eith unlock it through apple, or jail break it. there are plenty of sites with give you step by step details on how to unlock.

  • gees

    ok great do you any suggestions on what sites are the best to use thx??

  • MaryJonathen

    Hi Everyone

    I just want to tell you that after waiting, I found a specefic, new item : the GEVEY Turbo SIM
    and thanks to it I successfully unlocked my iphone 4 basebands 03.10.01 and 02.10.04
    I bought it from this site;
    It is really excellent !!

  • Anonymous

    Is there a program to Unlock your ip4 with the 5.0.1 update?

  • Mike7

    I called Verizon today and asked to unlock my i-phone4s. They agreed so that I could go to Costa Rica and purchase a local SIM. They said that only one smart phone per plan could be unlocked every 10 months. Strange restriction… but it doesn’t matter. They unlocked my phone 🙂