Tutorial: Unlock iPhone 3GS With UltraSn0w

By , Jul 8, 2009

This short tutorial will show you how to unlock your iPhone 3GS using UltraSn0w. Unlocking your iPhone 3GS will allow you to use your iphone with any cellphone carrier in the US and in the world, assuming they use SIM cards.

Before starting, make sure this is the latest tutorial on unlocking the iPhone 3GS by visiting this page.

Unlock iPhone 3GS Guide:

First you have to jailbreak your iPhone 3GS. Read my RedSn0w tutorial on how to do that first. It should take about 10 minutes and it is a necessary step to be able to unlock your iPhone.

After jailbreaking your iPhone 3GS, follow these simple steps to install UltraSn0w:

  • Launch Cydia.
  • Add the following source to Cydia repo666.ultrasn0w.com (note there is a “0″ in sn0w, not an “o”).
  • After installing this source in Cydia, search for “UltraSn0w”.
  • Install UltraSn0w and reboot your iPhone.

That’s it :)

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  • Indhiraas

    Hey Apple guys did you ever hear of the saying, ‘if something is made it could be broken too’. This is hilarious hehehe. Perhaps Appple should hire DEV team hehe

  • Will D.

    Hi Sebastien,

    Could you please clarify these 2 instruction lines from the Unlock iPhone 3GS Guide:

    1)Launch Cydia — Where can I find Cydia?

    2)Add the following source to Cydia repo666.ultrasn0w.com — What exactly “the following source” that you are talking about and where can I find it?

    Thank you in advance for your reply, and please forgive me for being ignorant because this whole thing is very new to me. Thanks again for your help.

  • http://www.iphonedownloadblog.com/ Sebastien

    Well once your iPhone is jailbroken, you will have cydia installed on your iPhone. Launch it and go to manage > sources > edit > add > and type in repo666……….

    Then go back to cydia and search for ultrasn0w. Install it and reboot.

    Done

  • BigRich

    Worked like a charm. Thanks guys!

  • Superlady

    I see cydia but when i press it, it keep going back to the springboard… Help Please!!!!

  • http://www.colinzeal.se ColinZeal

    Superlady:
    I think you should´ve only installed Cydia, not both Cydia and Ice.

    Go back to the beginning to re-jailbreak your phone. Then only select “Cydia”

  • TuyenTruong

    Hi, I followed all the steps without problem but when I install AT&T simcard I can’t access the internet. It always says “You are not subcribed to a data cellular service”. I am missing something?

  • AussieKb

    Brilliant!!! I had previously used purplera1n and it was all erased after an iTunes upgrade. From the on-set of install, it seemed “buggy”, but being a novice, I thought that was the way it was supposed to be. This time, (I actually purchased your app from the net under someone elses name when I first bought the phone) I used the redsn0w APP and it worked perfectly, professionally and easily – it helped that you have this tutorial. (I didn’t use it last time as I had no instructions with the purchased download)

    I just hope that whoever I previously paid the usd 29.95 to, pays you a royalty !!!!

    Thanks again

  • Munira

    The device does not start after I downloaded ultrasn0w!! Please help. All I get is the Apple logo when I press the power button on the top and then it goes blank. The Jailbreak worked flawlessly…

  • Munira

    BTW I previously unlocked another iphone and that worked great!

  • br0kenj0ker

    I’m having the same issue as poor little Munira here. The jailbreak was flawless but after installing Ultrasn0w, the device will not power up. I get the Apple logo for a couple seconds and then it powers down again. Please help!! Thanks.

  • br0kenj0ker

    Alright. It looks like I’m joining the hordes of FW3.1 people. Whatever happened, My phone needs to be restored And iTunes is automatically installing the 3.1 firmware update. Yay Apple!! :S

  • Manmeet Jaggi

    Okay i do everything till i get to putting in the repo666 part and it says cannot find any repository !! please help

    • Amber

      did you ever get the problem solved?? Mine is doing the same thing!!!!

  • David

    Which firmware does this work for?

  • http://www.iphonedownloadblog.com Sebastien

    @David – it is for firmwares 3.0 and 3.0.1. You can’t unlock the iPhone 3GS so far.

  • Supreeth

    @ Sebastien – I have an Apple Iphone 3GS which is on 3.0.1 OS, your last comment says you can’t unlock the Iphone 3GS.

    So Please advise. Need to Jail Break and Unlock my phone for usage in India.

    • http://www.iphonedownloadblog.com Sebastien

      Search for my post about blacksn0w

  • supreeth

    @ Sebastien:

    Just a clarification needed from your end, Iphone 3gs, OS 3.0.1.

    to Jailbreak i use: Redsn0w(RedSn0w 0.8 and add firmware 3.0 instead of 3.0.1, even though my phone is already on OS 3.0.1) and to

    To unlock i use blacksn0w(which is available to unlock the 3.1.2 baseband 05.11.07–as per your prev comment) to unlock my phone which is on OS 3.0.1.

    Please confirm.

    Thanks.

  • Eric

    hello Sebas, i brought a iPhone 3Gs 32GB (USA) recently but i encounter a problem. I live in Singapore and I wouldn’t use the SIM card on the iPhone here, am I require to jailbreak the iPhone then unlocked it using Redsn0w for the jailbreak and Ultrasn0w for the unlocked?

  • Supreeth

    @ Sebastien: Thanks a ton, i jailbroke and unlocked my 3gs phone. :)

    When i launch cydia, its saying in order to ensure your future ability to restore this device to Iphone OS 3.1, it is highly recommended that you allow cydia to keep up to date signature hashes for this device on the signature cache server. Doing this will ensure that, once a 3.1 jailbreak is released, you will always be able to continue to maintain this.

    What should i do, Please advice.

    Thanks.

    • http://www.iphonedownloadblog.com Sebastien

      Do what Cydia recommends you to do

  • goatrock

    A friend has an original iPhone that was upgraded to 3.0 when unlocked. The battery is now dead. If he sends it back to Apple for a battery replacement, will they lock it back up, making it unusable? Thanks!

    • http://www.iphonedownloadblog.com Sebastien

      @Goatrock They probably won’t change the software on it. Even if they did, you can always unlock again.

  • mina mamdouh

    do i have to insert an AT&T sim card during jailbreaking with redsn0w 0.8 & unlocking my iphone 3Gs 32 Gb with ultrasn0w ? or can i do it without sim card inserted ? coz i my country we don’t have an AT&T sim card

  • Sakkariya

    Dear Friend…

    i phone showing ‘no service’, it was unloacked befor and working perfect. Installed games after that face this problem.
    i phone Model. MA712LL, 8 GB
    Modem firmware. 04.05.04_G
    version. 3.0.1

    Please help..need to use Etisalat sim (Dubai, U A E)

  • Sakkariya

    Dear Friend…

    i phone showing ‘no service’, it was unloacked befor and working perfect. Installed games after that face this problem.
    i phone Model. MA712LL, 8 GB
    Modem firmware. 04.05.04_G
    version. 3.0.1

    Please help..need to use Etisalat sim (Dubai, U A E)

    Thanks in advance..

  • http://www.the-iguide.com Unlock iPhone 3Gs

    A friend has an original iPhone that was upgraded to 3.0 when unlocked. The battery is now dead. If he sends it back to Apple for a battery replacement, will they lock it back up, making it unusable?

  • Arshad Shah

    Hi Guys,

    I am having problem with unlocking my iphone 3G. I have jailbroken successfully but the problem is, our IPS has blocked the site repo666.ultrasn0w.com and now I cannot unlock my phone.

    Is there any way to use other link for unlocking rather than repo666…..?

    Hope you will help me.

  • Shinu

    im unlocking a 3gs but the phone reboot it go to recovery mode
    plz help

  • Archie1810

    Guys, I have an interesting question:
    You mentioned once I jailbroken my iphone i will have Cydia
    then I have to type in that source repo666….
    My question is:
    How can I get internet connection from a locked iPhone so that my locked iphone can download that source from repo666 inside Cydia? Wifi?
    Thanks…

  • noeld

    I have downloaded “blackra1n RC3″ the jail break is complete but I do not see the icon in my Iphone to complete the unlock. please help.

  • nadia

    i have jailbraked my iphone cause it say yr “sim card is not supported by this iphone”.then after i jailbrake the phone using limera1n,it was successful.but another problem coming up “no carrier detected”.so i used cydia which i hav downloaded from limera1n n search for ultrasnow and installed it to unlock my phone.so it was also successful,the “carrier” item appear on the general setting n i was so happy…but the problem is…the phone cannot detect the network carrier.can someone pls help me.i’m in malaysia.thanks.

  • justin

    hi i have got iphone 3gs 4.2.1
    used redsn0w and jailbroken and unlocked it i no about the issue of tethered
    and i am hoping that the dev guys can sort it soon
    but everythig is woring on the iphone apart from the phone any one no why and if i can fix it

    thanks for your time

  • Dean

    Has anyone given you a solution I am having the same problem.

  • Brian

    What firmware do i download for the iphone 4
    Model MD200LL
    Moder Firmware 3.0.04

    I have downloaded a few different firmwares so i can unlock my phone and they are all not compatible. PLEASE HELP!

  • Bert Carreiro

    Thanks! BIG QUESTION: I bought my 3s on ebay unclocked. THEN, later , I tried UPDATING the OS AND LOCKED the phone up some how. Can you help? THX
    azoresborn@gmail.com