Unlock iOS 5 iPhone 4 with Gevey SIM [How to] - iPhoneHeat

Unlock iOS 5 iPhone 4 with Gevey SIM [How to]

If you have an iPhone 4 unlocked with Gevey SIM running iOS 4.x.x and now want to update to iOS 5 with Gevey Unlock, this guide is for you. You can unlock iPhone 4 iOS 5 with Gevey SIM by following the instructions below which tells you how to preserve iPhone 4 baseband while updating to iOS 5, jailbreak and then unlock with Gevey SIM.

What is Gevey SIM Interposer?

Gevey Sim is an unlock solution for iPhone 4 with baseband 01.59.00, 02.10.04, 03.10.01, and 04.10.01 on iOS 4.x.x, and iOS 5.0. Unlike UltraSn0w, Gevey SIM is a hardware solution, a SIM interposer sits between the SIM card and the Modem to perform a classical MITM. Gevey SIM interposer should always stay in-between SIM card and the iPhone modem in order to stay unlocked.

If you’ve an UltraSn0w unlockable baseband 01.59.00, you’re recommended to navigate to this guide:

How to: Unlock iPhone 4 iOS 5 with UltraSn0w

Since Gevey SIM unlock depends on preserved iOS 4.x.x baseband, you’ll need to use RedSn0w’s “Custom IPSW” feature


Let’s Unlock iPhone 4 iOS 5 with gevey Ultra SIM

Unlock iPhone 4 iOS 5 with Gevey SIM

Step 1 – Preserve iPhone 4 Baseband

If your iPhone 4 is running iOS 4.x.x and has any of these basebands: 01.59.00 / 02.10.00 / 03.10.1 / 04.10.1, make sure you update to iOS 5 using a custom firmware with preserved baseband in order to unlock with Gevey SIM.

Follow this guide to preserve iPhone 4 baseband while updating to iOS 5:

How to: Preserve iPhone 4 baseband

Step 2 – Jailbreak iOS 5

Now you need to jailbreak you iPhone 5 running iOS 5 with preserved baseband. To jailbreak iOS 5, follow this guide:

How to: Jailbreak iOS 5 iPhone 4 with RedSn0w

Step 3 – Unlock with Gevey SIM

After the jailbreak, your iPhone 4 should be activated. Setup the iPhone 4. Now:

  • Go to: Settings > General > Network and Turn OFF the 3G
  • Turn Off the iPhone
  • Eject and reinsert the SIM card along with Gevey SIM and turn the iPhone ON
  • When turned ON, The iPhone will begin Searching… for the network

Gevey SIM unlock ios 5 (1)

  • After Searching for a few seconds, following popup should appear, hit the Accept button
  • Now wait for 15 seconds;
  • Then dial 112 and hang up after 2 seconds. The call does Not need to connect;

Gevey SIM unlock ios 5 (1)Gevey SIM unlock ios 5 (8)Gevey SIM unlock ios 5 (7)

  • Go to Setting app and Turn the Airplane Mode ON.
  • After a few seconds, “No SIM Card Installed” message should appear, hit the OK button;
  • Now turn OFF the Airplane mode; two popups should appear; the later one with “Invalid SIM Card” message. Don’t do anything and wait till the message disappears;
  • As soon as the message disappears, iPhone should show the signal bars at the top-left.

Gevey SIM unlock ios 5 (6)Gevey SIM unlock ios 5 (5)Gevey SIM unlock ios 5 (4)

That’s it! If the process fails, reboot, reinsert SIM and retry. Enjoy your unlocked iPhone 4 on iOS 5 with gevey SIM.

*** Remember that, on every reboot, you’ll have to repeat the GEVEY SIM process (Step 3) to get the signals back.

You can follow us on Twitter, Google Buzz, Facebook, and Subscribe to RSS Feed to receive latest updates.

67 comments… add one
Apple Umbrella October 17, 2011, 8:44 pm

really helping tips you’ve to sharing. thanks

Joao Pedro October 17, 2011, 9:00 pm

I just updated to iOS 5 my iphone 4 BB 04.10.01
It went alright, Gevey Sim unlock still working… However, i can´t use the data network of my phone. It means that I can only use Wi-fi.
Did this happend to anyone here? Does anyone know the solution?

Joao Pedro October 17, 2011, 9:12 pm

And my phone does not recognize the contacts anymore

Kinggs23 October 19, 2011, 12:22 pm

Which gevey r u using because I have a ultra and it doesn’t work

Joao Pedro October 21, 2011, 5:35 am

I’m using an Ultra as well… A managed to make everything work now.

Internet gave me a little bit more trouble, but it’s working perfectly now.

I know it’s a dumb thing to say, nut try googling your problem, and i’m sure you’ll find the answers.

If the unlock is not working, do the procedure again… It take a few tries to make it work fine (turning the phone off and on, calling 112 and etc…)

cesarvargas January 12, 2012, 8:42 pm

just enable data roaming and you`ll be fine

balu March 1, 2012, 11:57 pm

Joao Pedro Joao Pedro :

is it unthethered jail break ?

Casey May 28, 2014, 8:58 am

Turn on roaming service. That will do..

Leonidaas October 18, 2011, 6:19 am

how can i Preserve iPhone 4 Baseband on windows?

djvolak October 18, 2011, 10:56 am

They said at the top that the windows version was on the way soon. This is teathered unlock

Mark Jimmy October 18, 2011, 10:24 am

I upgraded my iphone 4 to OS 5 without preserving the iphone 4 baseband. i now have problems with activating my iphone with the Gevey sim. Any tips of how to activate the iphone or how to downgrade it to the previous os (4.3.5)

Thank you

jtekky October 18, 2011, 10:23 pm

ouch.. theres no way yet… your stuck… gevey isnt compatible with ios5… and you cant downgrade if u havent preserved…

Mark October 19, 2011, 3:06 am

Any options help please. I need to restore my phone.

Craignovak October 21, 2011, 2:16 am

You can downgrade to stock iOS 4.3.5 by doing an option restore and selecting 4.3.5 firmware, apple is still signing this firmware so your baseband will downgrade also, then follow the instructions to update to iOS 5 while preserving this baseband!

djvolak October 22, 2011, 12:08 pm

Yes I did the same and got it to downgrade back to 4.3.3 so it did work. I just had to run the jailbreak for 4.3.3 again to get it to come up.

Mark October 27, 2011, 12:15 am

Hi djvolak,

I couldnt downgrade to either 4.3.3 or 4.3.5. I keep geting the following message: Unknown error occured (3194

Can you please advise how your solved this.


Sharan October 20, 2011, 5:27 pm

and my gevey sim(supreme)just worked well without doing anything(i mean turning flight mode on off/dialing 112….but it does show only one signal bar… otherwise everything is working well..

iPhoneHeat October 21, 2011, 5:23 pm

because newery GEvey SIM performs these steps by itself 🙂

adi October 20, 2011, 8:58 pm


I updated my i4 (BB 2.10) to iOS5 but I am not getting Gevey Sim pop message where I need to “accept.” I did not do Jailbreak by the way. Just cooked custom IPSW with redsnow (beta 6) Does anyone know why I am not getting pop message? Thank you in advance

adi October 20, 2011, 9:49 pm

I jailbroke it also and It did not work. I assume that Gevey Sim Ultra is not working with iOS5. Maybe I am wrong but I tried everything to make it work. So if anyone knows what I am doing wrong please please let me know.. Thank you.

Craignovak October 21, 2011, 2:19 am

You need to cut all of te plastic off of your sim card so you only have the metal remaining, then use scotch tape to hold it in the correct place on your gevey chip!

Doba November 7, 2011, 12:39 pm

I just updated mine to iOS5 as well. I could not get the message to pop up at all. What I had to do was install “SemiTether” and reboot my phone in the semi-tether state. The Gevey pop up shows and I did the 112 process. After you get a signal, power down like normal and “just boot” with redsn0w. Worked for me at least.

jrtavella October 20, 2011, 11:22 pm

Hi all,
How can I check which Gevey I have?

shakir October 23, 2011, 1:15 pm

snowbreeze upgrades iphone 4 bb 4.10.01 to iOS 5 without change in bb with gevey sim

Mandriv November 3, 2011, 3:32 am

I did what was mentioned but the iPhone doesn’t boot without redsn0w help, apple sign hangs for a while and then a wheel shows (frozen) and nothing happens.

Any idea why is that?

jokira247 November 5, 2011, 7:52 pm

does gevey sim works with iphone 3gs ios 5 and baseband 6.15.00

Firm November 12, 2011, 5:01 am

hey. my iphone 4 update with new IOS and Baseband update to 04.11.08 HELP…. PLEASE

Firm November 12, 2011, 9:42 am

04.11.08 unlock ??

Gevey November 16, 2011, 1:25 am

What if i have 4.11.08 ?????

Doba November 16, 2011, 4:10 pm

There is no unlock for 4.11.08. Not even with Gevey currently.

Gevey only works with iPhone 4 currently. If you have a 3GS on 6.15.00 you can simply install ultrasn0w for unlock.

joyce November 18, 2011, 4:36 pm

my iphone is upgrade to 04.11.08 . . is there any other way i can downgrade it? or use it with a gevey? 🙁 right now i cant you it…

Francisco Garcia December 12, 2011, 4:00 am

Hola yo tengo un iphone 4 lo estaba utilizando con gevey , lo tenia en la vercion 4.3.3 y lo actualize al ios 5.0.1 mediante itunes sin guardar la baseban y se me bloqueo y ahora no me sirve para nada ¡¡ porfavor AYUDAAA¡¡…… hay alguna manera de regresar a la vercion anterior , o hay o saldra alguna gevey compatible con el ios 5 ,,,, o ya murio mi iphone …GRACIAS

llucky2050 January 25, 2012, 11:36 am

Hello there,
Today I had upgraded my Iphone into ISO 5.0.1 after that I had Jailbreak.
All process done perfectly and Its now in normal condition but No service showing upper left corner.I tried to resolve that according many you tube videos but it still shows no signal .I do please Help me
I am waiting.
iPhone 4, iOS 5.0.1, Modem Firmware 04.11.08

llucky2050 January 25, 2012, 11:39 am

will it signals will come back with gevey sim
plz some one help me,,that how can i get back my phone signals thanxxxx

Ray January 29, 2012, 2:05 pm

Anyone please I need to unlock my Iphone4, I updated to this:
iPhone 4, iOS 5.0.1, Modem Firmware 04.11.08

Anyone please? Help.

MrLonely January 30, 2012, 3:46 am

Hi everyone,

I’ve an Iphone4 with 4.1 IOS and 02.10.04 bb. I’m planning to unlock it with gevey as I’ve waited a lot for the soft unlock.

I’d like to upgrade to IOS 5 but I want to know which one to do 1st?

Unlock or upgrade.

If upgrade should I need to upgrade via Itunes or any other way to make it easier for the unlock?

Pls help me!!!!!!

MrLonely February 2, 2012, 3:49 pm

Pls do reply guys. I need your help.. Iphoneheat pls help me!!!!!!!!!!!!!!!!!!

iPhoneHeat February 2, 2012, 4:09 pm

don’t expect a software unlock anytime soon..
Gevey is the only solution to date to unlock the said baseband..
If you want to update to iOS 5.0.1, use a custom firmware.. RedSn0w can create one for you..
Create custom firmware with RedSn0w: http://www.iphoneheat.com/2011/12/create-custom-firmware-redsn0w/

RedSn0w CFW just preserves your baseband. You need to jailbreak later with RedSn0w..
Golder Unlocking RULE: Avoid Stock Firmware

balu March 1, 2012, 11:31 pm

i want to upgrade my iphone4 with ios5, i have 4.3.3 with 04.10.01 bb i unlocked with gevey sim
is it safe to upgrade my phone to io5 ????


balu March 1, 2012, 11:55 pm

is unthethered jail break is available for this ios5 ??

tomt March 5, 2012, 11:36 pm

I’m on Iphone 4 iOS 5.0 jb with gevey sim., but cant’ tell which gevey i have., I notice that my iphone would crash and restart time to time.? or would lost signals and i would have to restart the phone and do 112 to get back my service.

Anyone else have this issues?

Xhanny June 4, 2012, 6:54 pm

I have my iphone 4 IOS 5.1.1 and bb 04.12.01. Which method can i use to unlock it?

harry mills January 12, 2013, 11:51 pm

i am on ios 5.0.1 and my gevey used to work, i sam activated. now i’ve deleted my sam activation and gevey works until after i turn off airplane mode (no sim installed comes up) then sim failure etc but it wont search for signals and stays at invalid sim. any help, please?

KK January 25, 2014, 5:35 pm

I used gevey on my iPhone 4-version 4.2.1(8C148) firmware 03.10.01, can i upgrading from
iOS-4.2.1 to5 without any problem through this gevey i have?
can you help me!

Joseph January 29, 2015, 5:08 pm

you can upgrade to 4.3.3 without any ploblem. Before my iphone 4 was 4.2.1 now i upgraded to 4.3.3 it is working well.

Leave a Comment