Hi there folks! Today we have a guide for you to unlock iPhone 4 using Gevey SIM. But before you proceed, let me remind you how important it is to preserve your old baseband. The baseband that is eligible for unlock should be protected with all your effort as losing it would mean you can’t unlock your iPhone. iTunes can update your baseband while updating to iOS 5.1.1.

Unlock iPhone 4 with Gevey SIM

Ultrasn0w 1.2.7 can unlock older basebands on iOS 5.1.1. However here the basebands which can be unlocked via Gevey:

  • Baseband 02.10.01
  • Baseband 03.10.01
  • Baseband 04.10.01

Guide to unlock iPhone 4 using Gevey sim

Step 1: Do a full restore, after that, eject the SIM card from the iPhone and reboot it.

Step 2: Switch off the Cellular data and 3G.To do this, go to Settings > General > Network.

Step 3: Insert Gevey sim and sim card together in your iPhone 4.
Gevey Sim Unlock iPhone 4

Gevey Sim Unlock iPhone 4 iOS 5.1.1 Firmware

Step 4: Now the accept screen will appear. Tap on Accept.

Step 5: Now you are likely to see No Service. Don’t worry! Wait for 15-20 seconds and dial 112 and hang up after a couple of seconds.

Step 6: Turn on the Airplay Mode and wait till you see the No SIM card installed message! Now turn off the Airplay mode. No SIM Failure would appear. Press Ok and the iPhone should be connected to the network.

Easy isn’t it? If you follow this tutorial correctly, the iPhone 4 would be unlocked on iOS 5.1.1 using Gevey. Those with GSM & CDMA iPhone 4S can use Gevey Ultra S for basebands up to 2.0.12 to unlock their iPhones. Feel free to comment below!

Update #1: After few years, we decided to update this article. We are strongly recommending you to use a factory unlock service to unlock your iPhone 4. Because the Gevey Sim solution is not permanent – it’s a temporary solution and you can’t update to the latest iOS version.

  • Adegoke

    im guessing this doesnt work for 4.12 basebands

  • Cris

    we’re all tired with these kind of posts. false alarm everyday.

  • idiot proof

    in case your dyslexic

    Baseband 02.10.01Baseband 03.10.01Baseband 04.10.01

  • Persoonaje

    Hi, about baseband, I have preserved my baseband and shsh blobs, but accidentally upgraded with itunes, is there anyway to make use of noBB firmware or shblobs?

  • Muhamed Salahaddin

    dear what about 4.11.8 ??

  • Adegoke

    no need to get snappy…

  • gavinshookie88

    does anyone have any clue with the unlock for baseband 4.11.08????

  • 대성공

    they forgot the 4.11.08/4.12.01 -> end of their greatness..They will never ever crack the 4.11.08/4.12.01, or if they even get a slight/glimpse of codes that can be crack, they will sell it to Apple . We are talking here about money people, not greatness..

  • saywhatt

    it’s a shame how man’s natural greediness takes place right away without thinking of others

  • Seyf Moon

    j’ai ramené mon iphone 4 hier et j’ai pas pu avoir le signal du réseau ! mais aprés avoir jeté coup d’oeuil sur cet article ! j’ai su comment desimloqué mon iphone 4 !! je vous felicite et remercie pour m’avoir donné la solution ^^ sur ma version : 5.1.1 .. merci ^^

  • tavorozco

    I have an iPhone 4 with iOS 5.1.1 but the bad news for me is that it has baseband 04.12.01 which means that Gevey isn’t working for my iPhoen anymore. I’ve tried dozens of “solutions” but none worked… is there a way to go back to baseband 4.10?

  • Pascal Eugene

    thanks dude ! worked ! <3

  • Jibril

    it worked for me , great your site , have good luck

  • D

    iphone 4s ios 5.1 base band 3.0.14
    can it be unlocked???

  • Maria Flodin

    i´ve unlock my 4s with 5.1.1 but now i can´t send messeages and surf. What to do ?

  • yasir

    i got an iphone 4S with baseband 2.0.10 and ios 5.1 . its on verizon i need to unlock it as i m in asia now. so gevey sim will work to unlock it? and which gevey sim should i buy plz guide me all the steps. waiting for reply hope someone help me out ,

  • nabin

    i got a iphone 4g but it lock can its work by gevey sim version 5.1.1 abd baseband 04.12.02

  • flybil

    Do I have to jailbreak my iphone to run a Gevey sim card?

  • ltsiong

    How a bout my Iphone 4 can unlock it for IOS 6.0.1 ? Auto upgraded by ITunues !

  • inzii

    how to unlock with baseband 04.12.01

  • armando

    can it work on the iphone 4, with ios 6?

  • UnlockBoot

    You need to preserve the baseband to 4.10.01 — Use sn0wbreze to create custom iOS 6 firmware, then follow this tutorial.

  • UnlockBoot

    What is your baseband?

  • UnlockBoot

    No. you can use gevey sim without jailbreak.

  • UnlockBoot

    You can use factory unlocking to unlock 4.11.08 — gevey sim isn’t updated to support this baseband.

  • UnlockBoot

    Factory unlocking …

  • Amine MBS

    Does It Work with iOs 6.1 with baseband 04.10.01

  • Priyanshi

    does one gevey SIM bought in local country works internationally? or have to buy separate Gevey for each country

  • john

    will gevey sim work on firmware 04.12.05?

  • ja

    jp sb i phone 4 Baseband 04.10.01 need unlock help me..plz

  • IReal Swaroop

    how to find baseband..??

  • George Robert

    hy i have iphone 4 5.1.1 baseband 04.12.01 in blacklist what i can do?

  • srkh0ney

    iphone with 6.1.3 firmware 4.12.05 with gevey how to unlock ?

  • srkh0ney

    iphone with 6.1.3 firmware 4.12.05 with gevey how to unlock ? pls help i updated mistakenly