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

Posted by Ben 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)



← Older Comments
  • Mr.Meet

    steps are working perfectly. I would have search on net first. I paid 500 bucks for these steps.

  • Niecy

    Hey,
    when I turn my iPhone back on, it doesnt say sim acepted, also when I turn on airplane mode, nothing happens. I also have T-Mobile and followed all the instructions to the T, including calling 112 .. Please help :(

  • Briian

    I've been trying to unlock my iPhone 4 using a Gevey TurboSIM but when I reboot my iPhone it immediately appears a message on the screen that says "No SIM card installed" and where the signal bars appear it says "No SIM" and it stays like that. What could be wrong with my iPhone because I cannot unlock it if it keeps showing my such message?

  • Ting1007

    Hi there, I try all the steps but at the end it pops up said SIM Failure. Someone who know what to do please help. Thank you

  • keko717

    hi

    After unlocking my iPhone4 using gevey turbo card, i accepted upgrading of my phone sent by iTines.after i did upgrading my iPhone it is locked again. is there any new version of gevey card to unlock the phone?

  • chantal

    My Ip4 has the version5.0.1 will these work on it?

    • http://jaxov.com/ Jacklord

      @chantal Hi,

      As far as I know Gevey works with iOS 5.0.1. Just be sure to create a custom IPSW using redsn0w or sn0wbreeze to preserve your unlockable baseband.

  • chantal

    Hi im following every step but i dont get the 1 bar signal so i cant get the iphone to start working i have the iphone 4 with the new system

  • yogeshbhuva

    hi i m from India I have purchased iphone4 with turbo sim of gevey. i lives in gujarat state and my job is such i need to travel to different states. but the problem is when i enters to other states my carrier goes away and it shows no services i m really worried about it. as i can not be in contact with after entering other states. kindly suggest what shall i do. my iphone is at&t make. kindly reply me if u have any solution to get carrier in other state of India when I am leaving my own state (Gujarat) plz do reply me on my mail id yogeshbhuva@gmail.com

  • faisal antas

    i forgot to enable 3g... how can i on my phone?

  • filmon

    hey

    After i put my sim card, it says "Different SIM detected. What do i have to do to make it work again.

  • Kat

    Thank you so much for this info! My iphone 4 almost always gets No Service and I always had to rush back to a service center every time this happens! Now I can get my signal back by following these steps posted. Thank you! :)

  • Kishore Kumar

    My Iphone4 is with the version of 4.3.3(8J2) and modem firmware 04.11.08. Is there any way to unlock it

    • http://twitter.com/pram0dm Pramod

      Nope.

  • san

    Hey Bro,

    A million Thanks for posting this. I was very much worried when my phone went into no service.. I followed the steps exactly like you said and it work fine. Thanks again and Great Job :)

    Cheers,
    SaN

  • juju

    hi,
    my iphone 4 is not showing any other wifi connection but i can connect my home router device. i mean if in airport there is free wifi but i can't connect and it now showing any wifi list also . i m using 4.3.5. thanks

    • http://twitter.com/pram0dm Pramod

      Make sure that your within a 70-80 % signal strength radii of your Wi-Fi router / hotspot. By default, Apple devices don't connect to those wireless hotspots which it considers too far away & therefore you don't see it on your device as well.

  • Laxman Ghimire

    Hi Pramod, Thank you very much for your prompt response and please let me be informed if there is the solution. Thank you.

  • Laxman Ghimire

    My Iphone4 is with the version of 4.3.3(8J2) and modem firmware 04.11.08. Once I tried to update ios5 and then it is locked and I tried to unlock it by visiting some technician here in Tel-Aviv, Israel but no one could succeed to unlock it. Is there any solution to unlock it, please do let me know. thank you.

    • http://twitter.com/pram0dm Pramod

      There is no way that you can currently unlock your iP4 with the 04.11.08 BB on it. Wait for a new Gevey / an unlock solution to arrive. It won't be out anytime soon either. :(

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