The Dev Team has updated their UltraSn0w iPhone unlock for iOS 4.2.1. UltraSn0w 1.2 will unlock iPhone 4 baseband 01.59.00 and iPhone 3G/3GS basebands 04.26.08, 05.11.07, 05.12.01, 05.13.04 and now 06.15.00.

If your iPhone 4 is not on baseband 01.59.00, you will not be able to unlock it. If your iPhone 3G or 3GS is on one of the baseband version mentioned above, then you can follow the instructions below…

If your iPhone 3G or 3GS is not on one of the baseband version mentioned above, you will have to first update your baseband to 06.15.00. See our PwnageTool tutorial or RedSn0w guide to do this.

This process doesn’t come without its share of risks, so it is very important you read this before doing anything. Seriously, make sure you read it.

Step 1: Make sure your iPhone is jailbroken using PwnageTool or RedSn0w.

Step 2: Launch Cydia, and search for UltraSn0w.

Step 3: Download UltraSn0w.

Step 4: Reboot your iPhone.

Your iPhone is now unlocked. There is no real way to test it until you pop a different SIM card in.

  • Daniel E. Rodgers

    Me too…!

    There is a lot of talk about the D-Team being paid by apple. But it is a quite strange that IOS 4.3.1 has come out so fast. My train of thought is that the Dev Team is/was waiting to see if there are/were any Fragmentations coming out before they release a UL.

    • husnain

      hey friend my i phone has 4.2.1 version and base band 3.10.01 is its unlock available

      • phillip

        Where? I need it.

  • roxanne

    so do i have to update my iphone to 4.3?? in order to jailbreak and unlock with the new unlock the dev team came out with?

  • ClearedOut

    I have 30 Gevey iPhone 4 TurboSIM available. $65 Shipped to anywhere in 48 States. Let me know if anyone needs

    • Seuly

      in my country Cambodia, they sell only $60.

      • Randy

        Where do they sell.. I am in Cambodia

    • Rohit

      in india it works for vodafone.

      • KC

        my i phone 4 has 4.2.1 version and base band 3.10.01 is its unlock available in india.. if yes.. please share the detail..

        am waiting for your reply.. .

    • Rohit

      my email anandilu@yahoo.com

      i need 1 gevey sim.

    • Sidd

      This gevey is bullshit. I used n unlocked my phone exactly as per the instruction but i thought it worked but actually it didnt work. My phone is still locked to xxxxx network carrier. I cant use any other sim. Here dont say now u might have got duplicate sim. I bought that sim from e bay. I asked the seller about this they refunded my money bck. If that was duplicate sim no seller would sell these shit

  • Kim

    no more crying for the unlocked. I’ve got the turbo sim and it works well! Oh yeah!!

    • Vic b

      Does it really work, does it ever stop working. Is it worth it?

    • husnain

      what is turbo sim

  • hasib

    I dont know VIC but the thing is that I cant wait anymore for the Dev or Muscle nerd… it is just useless waiting for something which aint got any reality

  • Vic b

    So pretty much the turbo sim is the only unlock for the4.2.1 bb 3.10.01 and there’s nothin else which leaves me no choice but to get it. Nothin else out there rite?

    • ghiles

      basically

  • Kim

    Turbo Sim works well here in China.

    • adoo

      kim will u tell us turbo sim’s problem and headaches like redoing it when u dont have signal is it true???if u go to elevator which has no signal inside we have to do what to use turbo sim again???

      thank you

  • Rak

    Gevey is work already but why i can not find Internet Tethering in my iphone4?

  • Kim

    I’ve been using it for a few days and have not encounter any signal lose so far. The activation of the turbo is actually quite simple. I did it right at the first time.
    For internet tethering, just switch on the data roaming in the setting, you should be able to go online through GPRS.

  • Evoss

    I JUST REEECEEEIVEED GEVEEYY SIIM AAH ITS WORKING O2-UK

    • Vic b

      Can the gevey sim ruin your phone, can it cause problems to it that can damage phone

      • Evoss

        ma???????? WTH u sayin ???????????????/

  • Vic b

    Can the gevey sim ruin your phone, can it cause problems to it that can damage phone?

  • KC

    my i phone 4 has 4.2.1 version and base band 3.10.01 is its unlock available in india.. if yes.. please share the detail..

    am waiting for your reply

    • KC

      Hey…..

      i have Gevey sim and it is working.. with AIRTEL sim.. … (bangalore)

      Thanks,
      KC Mahesh

  • Silent screamer

    When do they give us an unlock solution for the Iphone 4??? Every time I check the forums or websites someone says it’s gonna be a couple of weeks at max but it has been several months now…

  • Saks

    Don’t expect the unlock to be released, if at all, way before iPhone 5 is out. It only makes sense doesn’t it. Apple ppl don’t make and market cell phones so that these can easily be hacked. The Dev team seems to be in some silent arrangement with Apple whereby the intellectual property is to be respected at all costs. Otherwise there won’t be no Dev team/s in the first place.

    The timing for the unlock is anybody’s guess therefore!

  • kumarswamybe

    in bengaluru where is the center iphone 4 uniocking(4.2.1)

    • KC

      you can use Gevey sim to unlock.. it is available in bangalore … i have got it for my phone .. and it is working..

      cheers
      KC

  • adoo

    hi guys;

    as i said before i am in china right now and 2 days ago i boought Gevey turbo simm , can u believe it it workssssssssssssssss 🙂 even with my home country simm card and roaming, think there is no other way to unlock 4.2.1 BB 3.10.1 , I THINK DEV TEAM HAS PEOVIDED IT AND MAKE IT COMMERCIAL USE

    • Seuly

      You rite.

  • raj

    hey friend my i phone has 4.2.1 version and base band 3.10.01 is its unlock available

    • KC

      USE GEVEY SIM .. it works.. am using it..

      • aman

        how much did the gevey sim cost you?

  • shan

    how?

  • Mohit

    Hey friends it look that even after the release of ultasnow 1.3 which will be released just in few days we will still be not able to unlock 3.10.01 as its just for the older basebands, so the only option for us is Gevey…

    • Rafi

      I’ve 3.10 too and heared about REBEL sim card unteatering did any one using it?

    • Rafi

      I’ve 3.10 and 4.21 and heared good things about REBEL sim card unteatering did any one using it?

  • Raj

    hey friend my i phone has 4.2.1 version and base band 3.10.01 is its unlock available?

    • KC

      Use Gevey sim.. it will work.. i am using it ..

  • Paul

    Hi thanks for all your hard work 🙂

    I have a 3g with a firmware of 05.15.04 that I bought and used with a contract until I ended it in the Uk before coming to live in the US

    I see that this is not on your list of unlockable devices but wanted to ask is there a way I can unlock or get this phone unlocked for any carrier in the US

    Thanks in advance

  • hiensmile

    can I use Facetime with the turbo sim

  • Sarita

    i finished installing ultrasn0w, but now it does not recognize my SIM card and doesn’t allow me to make any phone calls. What can i do??

    • Snos2

      Go back to cydia sources and remove
      Ultrasnow .? If your are on the newer baseband the ultrasnow 1.2 does not work

  • Vicky

    Finally finally i can use my iPhone. Thanks to gevey sim. This works in India with airtel 🙂 🙂

    • sunny

      where u purchase it

  • Vineet jain

    @Vicky : hey I have iPhone 4 v4.1 bb 2.10.4 in India. Do you think it will work here with the gevey sim?? And are u facing any problems with it?? I have a Vodafone connection btw

  • Vineet jain

    @Vicky : hey I have iPhone 4 v4.1 bb 2.10.4 in India. Do you think it will work here with the gevey sim?? And are u facing any problems with it??

  • Vineet jain

    Vicky : hey I have iPhone 4 v4.1 bb 2.10.4 in India. Do you think it will work here with the gevey sim?? And are u facing any problems with it??

  • rafa

    if I put to the iphone 4 the sim I disturb I can put jailbrake to descend cydia

  • rafa

    if I put to the iphone 4 the sim turbo I disturb I can put jailbrake to descend cydia

  • Harsh

    Any pointers to buy Gevey Sim in Bengaluru??
    I’ve iphone4 v4.2.1 bb 3.10.01
    Any idea will it work with Reliance GSM???

  • Gan

    GEVEY iPhone 4 turbo sim unlock all version
    is it worth buying. will it really works and it wont damage the phone

  • R

    does anyone now how to fix error 1015?

  • Bommy

    hey m from india and i want one gevey sim……..send me an email regarding this on bommy_ahuja@hotmail.com ………… i m having iphone 4 with baseband 3.10.01 from canada…..plz response asap 🙂

    • Vic b

      Go to ebay

    • Navneet

      were do u stay?

    • Seuly

      in cambodia only $30

  • I’n using GEVEY sim to unlock my iPhone 4, V.4.1, bb 02.10.04 in a Brazilian carrier. Everything is working EXCEPT that I’m unable to send MMS, even using the MMS settings of the carrier company.
    Who knows what can I do to solve this problem?
    Thanks!
    Gerson Rissin

  • Ann

    Is there disadvantages in using gevey sim?? is it easy to do the unlocking process everytime you restart the iphone?

  • Navneet

    any one wants a gevey sim in bangalore for 2k, can mail me on navneetmakharia(at)yahoo.com

  • tunde

    do i need to be connected to the internet with the iphone to download ultrasn0w via cydia?

    • Yes, you have to be wither on wifi or 3G/Edge

  • Shekhar

    Hey I’m from bangladesh and I wants a gevey sim for unlock my phone which baseband is 2.10.4. So somebody can help me from where I can buy a gevey turbo sim in bangladesh.

  • Mohit

    Hey guys for gevey it really works

  • Vamshi Gupta

    I have iPhone 4 iOS v4.2.1 BB 3.10.01. If I upgrade iOS version will that give the opportunity to get my BB changed as well ? or is it that BB is something hardcoded into PROM by default iPhone carear.

  • Ahhyann

    Gevey seems to work fine with me i’m from the Philippines….Apple Iphone 4 4.2.1 bb 03.10.01

    • lol972

      Hi Ahhyann,did it work fine at the first time you try it ? When you call the 112, did the call stopped automaticaly ? Thanks

      • Ahhyann

        You just have to try it again and again though…You have to end the call after 2 seconds…Ironically you will find out that your sim will be working if you got the pop up simcard failure…hehehe….That is after you turn off again the airplane mode..

  • lol972

    Gevey don’t work for my IP4 421 BB 03.10.01. I can’t pass the step n° 4, just after 112 calling, the message “no sim installed” stop the procedure. I tried all the different ways i found on the net.
    Take care about all the contrefeit Gevey on eBay !!!

    • Daniel E. Rodgers

      just keep turning airport mode on and off… wait for like 1 minute between turning airplane mode on and off

  • I want gevey sim in bangalore for 2k contact me soon…

  • I want gevey sim in bangalore for 2k – 5k contact me soon…

  • navneet

    drop me ur mail id and contact number.. at navneetmakharia(at)yahoo.com

  • Haseeb

    Hi All … Gevey works well but after sometimes it provides Hardware problems for u r iphone … how much a gevey costs 40 bucks and 50 $ better than that is what i did … i factory unlocked my T mobiles of UK only on 85 dollars, my i phone 4 version was 4.2.1 and bb was 03.10.01 so problem solved now it works like a beauty, and yeah they wont take u r phone they will just take the IMEI code of ur mobile and after 3 days they will contact u and let u know that u r mobile is unlocked and now u can use it anywhere in the world (and yeah i did it in india in a small city , but if u do it in delhi they will charge u mroe than 200 USD )

  • bill

    gia sas paidia..osoi apo ellada endiaferontai na agorasoyn gevey sim gia iphone 4 as moy steiloyn mhnyma exw tetoies pros pwlhsh…50 eyro th mia opoios endiaferetai..xekleidwnw mesa se 3 lepta..opoia ekai an einai h ekdosh…opioasdhpote etairias..thx 6936755940

  • Piyush

    Hi there,

    I have an Iphone 3G. The version is 4.2.1 and the baseband is 05.15.04. My phone is jailbreaked but i cant unlock it. Can anyone help me please. I am planning to go to US so i can buy a new sim card there and use it on my phone. Any help will be really appreciated!

    Thanks,
    Piyush

    • Haseeb

      Hi Buddy … Guess what the dev team was not able to unlock the I phones but yeah i know a team in india who factory unlocks the I phones withen 5 days … U jsut need to pay them … and give them the IMEI number and after 5 days u r mobile is unlocked the same wAY I unlocked my 4 I phones which was mine and my other friends … all were locked but those guys unlcoked it … with around 80 USD each mobile … chaw

      • Amar

        Could you give the contact details pls. Thanks

    • JomanJi

      lol, I am a bit late, but when you jailbreak, you select “Install iPad Baseband” and then unlock it!

  • I’m using GEVEY sim to unlock my iPhone 4, V.4.1, bb 02.10.04 in a Brazilian carrier. Everything is working very well. That’s what I can say…

  • @Sidd, the Gevey is still working perfectly with my iPhone 4. I bought it in Miami and it seems to be An. Original one…
    Regards.