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How to Use Gevey Turbo SIM to Unlock iPhone 4 on iOS 4.1/4.2.1/4.3.3?

Author: Ben Johnson on April 19, 2011

This guide is for those iPhone 4 users who have bought Gevey Turbo SIM and are little confused about its working. For those who don't know, Gevey SIM is well capable of unlocking iPhone 4 01.59.00, 02.10.04, 03.10.01 & 04.10.01 baseband on iOS 4.0/4.1/4.2.1/4.3.3. I am myself using Gevey SIM to unlock my iPhone 4 and have found no noticeable drawback except i have to redo the unlock procedure if my iPhone needs a reboot.

iPhone 4 Unlocked Using Gevey
UPDATE#1: Gevey SIM Pro: Faster IC, No Need to Cut SIM, Support Multiple Carriers
UPDATE#2: Gevey Pro vs Gevey SIM [Hands-on]

Before proceeding to the unlock procedure, let me clarify some of the widespread misconceptions about Gevey SIM:

  • Gevey SIM has no effect on the battery life of your iPhone.
  • You do not need to jailbreak your iPhone 4 before using Gevey SIM.
  • Gevey SIM never slows down your iPhone in any way.
  • Losing signal for 2-3 mins will require you to redo the unlock procedure again. Losing signals for some seconds have no effect on the unlock.
  • To unlock your iPhone using Gevey SIM, you must call 112 for atleast 2 seconds. After 2 seconds, you can safely drop your call.

Steps to Unlock iPhone 4 on iOS 4.1/4.2.1/4.3.3 Using Gevey SIM:

STEP 1: Navigate to Settings » General » Network and turn OFF 3G. Keep Cellular Data and Data Roaming option ON. Make sure there is NO unofficial SIM present in your iPhone SIM tray at this time.

Gevey SIM (Turn OFF 3G)
STEP 2: Remove stock SIM tray from your iPhone

Gevey SIM (Remove Stock Sim Tray)
STEP 3: Put Gevey SIM interposer in Gevey SIM tray.

Gevey SIM (SIM Tray & SIM Interposer)
STEP 4: Put unofficial iPhone SIM on top of Gevey SIM interposer.

Gevey SIM (Gevey SIM Ready)
STEP 5: Turn OFF your iPhone by pressing the power button on the top.

Gevey SIM (Turn off iPhone)
STEP 6: Put Gevey SIM tray along with Gevey interposer and unofficial SIM into your iPhone.

Gevey SIM (Put Gevey SIM in iPhone)
STEP 7: Turn ON your iPhone.

Gevey SIM (Turn off Your iPhone)
STEP 8: After turning your iPhone ON, you will see SIM welcome message. Tap on the Accept button to continue. At this stage, you will find 1 signal bar in the status bar of your iPhone.

Gevey SIM (Welcome Message)
STEP 9: As soon as you will tap on the accept button, you will see Searching... and then No Service message on your iPhone. Do not do anything yet. Wait while 1-signal bar reappears on your iPhone status-bar. Once you see 1-signal bar, dial 112 from your iPhone.

Gevey SIM (Dial 112)
STEP 10: After exactly 2 seconds, tap on the End button to hang-up the call.

Gevey SIM (Hang Up 112 Call)
STEP 11: Go to Settings and turn Airplane Mode ON. Do not do anything until you see No SIM card installed message. As soon as No SIM card installed message pops-up, tap on OK button to close the message and turn Airplane Mode back to OFF.

Gevey SIM (No Sim Card Installed)
STEP 12: As soon as you will toggle Airplane Mode to OFF, you will see SIM Failure message. Thats it! Tap on OK button to close the pop-up and wait while your iPhone unlocks itself.

Gevey SIM (SIM Failure)
STEP 13: After some seconds, you will see full signal bars in the status bar of your iPhone. Thats it! Enjoy your fully unlocked iPhone 4 with Gevey Turbo SIM :D

Gevey SIM (iPhone 4 Unlocked)



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  • Stephanie

    is there a way to get the upgrade off?

    • http://twitter.com/pram0dm Pramod

      I believe iTunes always asks your confirmation whether to update your device / not. Just be careful not to do so the next time. iTunes never updates your device unless you have confirmed it. Also, the next time you see this pop-up, make sure to Cancel & Do Not Ask Me Again it.

  • Stephanie

    I upgraded my iPhone to iOS 5 and lost my Gevey unlock. Is there a way for me to unlock my phone yet?

    • http://twitter.com/pram0dm Pramod

      Nope, not anytime soon either. :(

  • isvhara

    ios 4.3.5
    baseband 4.10.01
    i havent try it with another gevey, becus i just have 1 of them :(

    still not working until now

    • http://twitter.com/pram0dm Pramod

      What about a different carrier SIM?

  • mo3ad

    pleas, i did every steps, but network searching didn't find any thing!!
    I want to ask if there is any thing to change it in setting like network setting.

    please answer me.

    thanks

    • http://twitter.com/pram0dm Pramod

      What version of iOS & Gevey version are you currently running on your iP4?

  • Enny j

    After dialing the 112 the no sim card comes up before I turn my airplane mode on...ca someone explain to me what's up with that....this is really frustrating as I have to restart all over again and I have done this several times...please I need your Advice on that

    • http://twitter.com/pram0dm Pramod

      Try the same Gevey with a different carrier SIM. Does that too behave in the same manner?

  • azize tunc

    Hey , I would like to use my iphone4 using T mobile...if i upgrade the operating system to 5 do you think i will be able to use my iphone with t mobile ? or my modem firmware is 04.10.01 ----and the version is 4.3.3 so if i upgrage the operating system what can i do to use my iphone with t mobile plan..if i cant upgrade my oprating system my current version of iphone will able to make me use t-monile...can you help me with this? i wanna use my iphone with t mobile...thanks...or give me the web sites i can hack my iphone...

    • http://twitter.com/pram0dm Pramod

      Updating to iOS 5 straight from iTunes will indeed kill your Gevey unlock. If you want to update your device whilst preserving your BB, make sure that you always restore to a custom iOS IPSW. Read this http://bit.ly/qWieKu. Use Sn0wbreeze 2.8b11 instead because you can now restore only to iOS 5.0.1. Rest of the steps are all the same.

  • Anthony

    sweet I got it to work! =D

  • isvhara

    hello i wanna ask,
    i already follow the instruction, at the first time i use provider A, and it success.
    and then i change my provider to B, and follow the instruction again
    but when the final step ( waiting until the full signal ) suddenly its says searching, no more singnal appears. i wait for a few times and it says no service.

    i get frustated with this, and change itu again to provider A, but it all the same, it's not working anymore..

    can you help me with this? thanks

    • http://twitter.com/pram0dm Pramod

      What are your current iOS & BB version details? Also, did you try the same with a different Gevey as well?

  • Kishore Kumar

    Hello,

    I got a used iphone - 4 in U.S and got it jail break. I'm currently in India and trying to use my Airtel micro SIM. When i insert the Airtel SIM, after reboot it says invalid SIM. I saw this forum now. Please let me know if I put a Gevey SIM will solve my problem?

    • http://twitter.com/pram0dm Pramod

      As long as your modem firmware is 04.10.01 & below, a Gevey SIM will be able to unlock your iP4.

  • Anthony

    I already tried those earlier. nothing =(
    the gevey message never popped up

  • Anthony

    yeah i know. i used the link u sent me using snowbreeze. u said it would work if i did that

    • http://twitter.com/pram0dm Pramod

      Read the Updates towards the end mentioned on the same post that I had pointed you to earlier here http://bit.ly/p2VAxx & try them.

  • Anthony

    so updating my iphone4 to ios 5.0.1 started to work and got it to factory settings but when it started to update. it said my sim card was invalid... the gevey sim message never popped it either

    • http://twitter.com/pram0dm Pramod

      If you didn't know, the Gevey SIM works no more on iOS 5 & above unless you have actually preserved your BB with a custom IPSW.

  • Anthony

    when i tried updating to the ios5 using snowbreeze, i kept getting the iphone error 3194.
    when i used tinyumbrella to fix that, it just became error 2005....

    • http://twitter.com/pram0dm Pramod

      You cannot restore to iOS 5 anymore because Apple has stopped signing it already. You can only restore to iOS 5.0.1 if you want to.

  • Anthony

    how would I go about doing that? details much appreciated.

  • Willy

    thanks for your helpp.. i'll buy new simcard :)

  • Willy

    Hi

    i want change my local sim card wih another local sim card with gevey.. but it can't why? gevey can't read my another sim card after i change it.

    need help.
    Thanks

    • http://twitter.com/pram0dm Pramod

      Probably its an issue with the SIM itself? Have you tried using a third different SIM with your Gevey as well?

  • jim

    I have a IPhone 4 with IOS 4.3.5 (8L1) Firmware 04.10.01 (AT&T) I currently do not have service on it, I have a Nextel that I have service on and would like to move to my IPhone is this possible with a GEVEY SIM?

    Also what happens when you reset the phone… (reset all settings) dose that put it back to a different IOS like what it came out with ?

    • http://twitter.com/pram0dm Pramod

      Yes, the Gevey SIM will be able to unlock your device on the 04.10.01 BB. Resets will not affect anything but make sure that you never update to the stock versions of iOS directly from iTunes.

    • http://twitter.com/pram0dm Pramod

      Yes, you can very well use a Gevey SIM to unlock your device on the 04.10.01 BB version. Resetting your device will not screw up your device, but make sure to not update your device via anykind of updates from iTunes. Always use a custom iOS.

  • LG

    I had ios 4.3.3 in to my iphone and it was the unlocked one. Once the ios5 released, I upgraded it and then my phone got locked and everytime I tried to unlock it by dialling 112....... airpalne mode.... so on, finally i get the messege Invalid Sim. Is there any way that I could return back to its previous version software i.e, 4.3.3.

    • http://twitter.com/pram0dm Pramod

      Nope. By updating to iOS 5, you have lost the Gevey unlock. Currently, there is no way for you to unlock your iP4.

  • Anthony

    Is there anyway I can update my iPhone4 to ios5 and have it still unlocked?! Maybe update then unlock again or something?!

    • http://twitter.com/pram0dm Pramod

      Yes, by restoring to a custom iOS 5 IPSW, you can preserve your unlock while you update your iOS.

  • http://[email protected] Rappy

    does this work with ios 5.0?

    • http://twitter.com/pram0dm Pramod

      Yes it does.

  • Loren

    well, i'm not sure which method was used but i can tell you that now every time i turn my phone off and on again i will have to do the whole process. it's so annoying.

    is there anything that can be done about that ?

    • http://twitter.com/pram0dm Pramod

      Nope, its just how the Gevey works though there are other kinds of Geveys in the market that doesn't require this repetitive 112 dialing procedure after every reboot.

  • lac

    Do I have to redo the unlock process every time after I turn off the phone ? I'm using Ultra gevey with Telus.

    • http://twitter.com/pram0dm Pramod

      Yes, I believe so you should on a Gevey Ultra.

  • Loren

    thank you so much, this was super helpful but i have a question, now that i got it unlocked this way..

    will i ALWAYS have to go through " accept ... call 112... hang up.. turn on airplane mood.... etc " ? it's not easy as sometimes the " no simcard" alert appears before i get to turn the airplane mood on so i will have to start from all over.

    • http://twitter.com/pram0dm Pramod

      It depends on the type of Gevey that you use i.e if the whole procedure needs to be done only once or after every reboot of the device.

  • Nekeshia Jones

    Im trying to unlock the phone with Gevey,however im getting the no sim card installed error message(insert a sim with no pin lock) but thats after im able to accept and call 112,and i get a vm notification..what can I do?

    • http://twitter.com/pram0dm Pramod

      What are your iOS & BB version details?

  • glenn

    I can get my grevey pro to unlock and get a great 4 to 5 signal and edge working. Then about 3 to 4 minutes later or it seems if I start to do any web surfing the phone signal decreases to the point it looses t-mobile carrier and starts searching. After searching fo a few minutes it finds t-mobile again and all is well for several more minutes. 3g is off. What am I missing? Thnaks in advance and for info I am running jailbroke iphone 4 4.3.3 and 4.10.01

    • http://twitter.com/pram0dm Pramod

      It could very well be an issue with your carrier signal strength. Not sure though as to why it would behave like this. Have you tried a different carrier SIM? Is it still the same?

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