For first you need:
* iPhone any version
* WiFi (wireless) access to Internet on iPhone
* Windows PC or MAC with Internet access

Before start, it is highly recommended to carefully read sections Terms Used and the Notes, from the end of this tutorial

Step 1. Determine bootloader version:

a. In dialpad, dial *3001#12345#* and press Call
b. Look at versions, Firmware versions. If:
04.03.13_G - then is OTB 1.1.3 iPhone (Bootloader 4.6)
04.02.13_G - then is OTB 1.1.2 iPhone (Bootloader 4.6)
04.01.13_G - then is OTB 1.1.1 iPhone (Bootloader 3.9)
03.14.08_G - then is OTB 1.0.2 iPhone (Bootloader 3.9)
Note. This is a preliminary method to determine the bootloader version. It assumes your iPhone was not suffering any baseband upgrade / downgrade operations. The accurate method is described later.

Step 2. Restore iPhone to firmware 1.1.1:

a. download 1.1.1 firmware from here
b. Put iPhone in Restore mode by pressing and holding down simultaneously the power button and the home button until iphone screen goes black then release power button and keep pressing home button button for another 30 sec. Launch iTunes if it is not started yet;
c. press Shift + Restore on Windows (or Alt + Restore on Mac) and choose the firmware downloaded at line a

Step 2.1. Jailbreak + Activate 1.1.1
d. in DialPad, dial: *#301# then tap Call. Then delete with backspace the string *#301#, then Dial 0, tap Call, tap Answer, then tap Hold.
e. go to Contacts, tap + to add a new contact . At First Last type A, then tap on Add new URL and type prefs: then tap Save. Tap on Add new URL and type i.unlock.no. Tap on Save.
f. Now tap on prefs: and go in Menu to General, set Auto-Lock to Never, then go to Settings, Wifi and choose a Wifi network with Internet access;
g. press Home button;
h. Dial 0 in DialPad, next tap on Answer, the tap on Hold, next choose A from Contacts, then tap on i.unlock.no.
i. from the Safari tap on Tap here to jailbreak your iPhone
j. Wait until iPhone reboot itself.


Step 3. Unlock iPhone

Step 3.1 At first, check again the bootloader version, using the following method:
a. add source http://www.trejan.com/irepo in Installer. Do refresh
b. Install Baseband Info (bbinfo). Launch BBInfo from Springboard and check Bootloader Version at Baseband category.
From now on, you MUST use this Bootloader version as the REAL version

For bootloader 4.6:
- from Installer - System - choose BSD Subsystem and install it;
- from Installer - Tweaks (1.1.3) - choose 1.1.2-1.1.3 OTB G-Unlock, install it and follow the instructions
- go ONCE to Step 4 (don't repeat it after)
- from Installer - Tweaks 1.1.2, choose iWorld, then launch it from Springboard and choose your country. Reboot iPhone.

For bootloader 3.9:
- FIRST follow ONCE Step 4 (don't repeat it after);
- from Installer, choose AnySIM 1.2.1u from Utilities category;
- from Settings - set Airplane mode to ON;
- Launch anySIM from Springboard and follow the instructions;
- from Settings - set Airplane mode to OFF;
- from Installer - Tweaks 1.1.2, choose iWorld, then launch it from Springboard and choose your Country. Reboot iPhone.


Step 4. Upgrade to firmware 1.1.2
a. from Installer - Tweaks (1.1.1) - choose Oktoprep and follow the instructions;
b. download firmware 1.1.2 from here
c. launch iTunes, press Shift + Update on Windows or Alt + Update on Mac, then choose the file downloaded at line b
d. download jailbreak 1.1.2 from here and unzip to a folder
e. launch Windows.bat and the press Jailbreak button - on Windows (or double-click jailbreak.jar on Mac). iPhone will restart a couple of times (on Windows, if you cannot acces your iPhone after doing line then launch windows.bat again an press Boot from recovery).


Notes.
n1. If your iPhone have firmware 1.1.3 OTB, then:
- download firmware 1.1.2 from here
- launch iTunes, press Shift + Restore on Windows (or Alt + Restore on Mac), then choose the firmware downloaded now;
- jump to Step 2
n2. If your iPhone have firmware1.1.2 OTB, then:
- go to Step 2
n3. If your iPhone already have 1.1.1 firmware:
- if isn't jailbroken, then jump to Step 2.1
- if it is jailbroken, then go directly to Step 3
n4. If your iPhone already have 1.0.2:
- jump to Step 2
n5. If your iPhone was already unlocked with iPhoneSimFree (aka IPSF) then it have the 3.9 bootloader and the baseband is update resistant (the unlock is Permanent). In order to do the jailbreak and activate you can follow the steps described here EXCEPT the Step 3.
n6. If the baseband was already unlocked with older methods, before firmware 1.1.1 (eg iUnlock, anySIM 1.0...), then maybe it need an "revirginize" operation. Do it following this:
- add source http://i.unlock.no in Installer if wasn't present yet and do a Refresh
- point to The Virginizer from Installer - category Unlocking Tools and read VERY CAREFULLY at More Info. Install it and strictly follow the instructions. At the end you will need to Restore to 1.1.1 (equivalent to Step 2 in this tutorial), so, after that, you will need to continue directly from the Step 2.1 in this tutorial.
n7. it is recommended to use a SIM card without PIN (put your SIM card to other phone and disable the PIN)
n8. if your iPhone was updated “by mistake” to 1.1.4 firmware, then put iPhone to DFU mode:
- Power Off iPhone ;
- press and keep pressing Power and Home simultaneously;
- when the Apple logo appears (white apple), release the Power button, but keep pressing the Home button;
- open iTunes if it isn't open already and wait for a message who tells you iPhone is in restore mode;
- press Shift + Restore on Windows (or Alt + Restore on Mac) and choose 1.1.3 firmware from here
- go to note 1 - n1
If you have 3.9 bootloader, in order to unlock do:
- in Installer -> Install -> Clarified -> Unlock (1.1.4) - tap on Install (if you haven't iClarified category, then add the source http://installer.iclarified.com in Installer -> Sources)
If you already have 3.9 bootloader unlocked with IPSF then you are lucky: IPSF resist on 1.1.4. too.

Terms used:
Jailbreak: method who permit to install and run native 3rd-party applications on the iPhone
Activate: method for bypass iTunes activation
Unlock: method for baseband unlocking in order to use the iPhone with any SIM (any carrier) in the world
Firmware: base iPhone software;
Bootloader: portion of iPhone software who first launch at iPhone start
Baseband: firmware of iPhone's GSM modem
Springboard: iPhone's desktop
Installer: software application present on iPhone in Springboard, as a visible result of the jailbreak process; it is used to Add / Remove 3rd-party native applications on the iPhone
Dialpad: numeric keypad on iPhone, used to dial phone numbers. For a unactivated iPhone it can be accesed by sliding Slide to unlock. For an activated and jailbreaked iPhone, tap on Phone icon, then on Keypad

Hi, I have the question for the Iphone that;[LIST=1]
1. Unlocked, Jailbroken on OTB 1.1.1
2. Unlocked, Jailbroken on OTB 1.1.2
Want to go on 1.1.3 but still jailbroken and unlock?

Then, the OTB 1.1.1/ or OTB 1.1.2 that by accident upgraded to 1.1.3 but want to jailbroken and unlock.
Any help please, thank you.

Ref on 1, 2: what unlock method was used ?

Ref on accidentally upgrade to 1.1.3.... Do a restore in iTunes with firmware 1.1.2, then with firmware 1.1.1 and then follow the procedure, starting with step 2.1

All Soft Mod method...thanks..

why do i always loose my network connection when the phone gets on stand by ( screen shuts down)

now it would be usefull to add last step which is the upgrade to 113 !
thanks a lot for the great post

I see on some threads, is that true with condition of #1 and#2 above
(1. Unlocked, Jailbroken on OTB 1.1.1
2. Unlocked, Jailbroken on OTB 1.1.2
Want to go on 1.1.3 but still jailbroken and unlock?)
Just go to installer, look for 1.13 update than it'll be done?

Hi everyone,

Im new here, I have been watching these forums for a while now with great interest and I would love to get involved now.

I've just bought my own iphone but I have not activated it yet. This post has me intrigued, will this method of unlocking the iphone work on UK versions. By all versions I am assuming it will work on any version worldwide, hence I can unlock my iphone bought here in the UK.

thanks

Moonman

I did it but it ended with recovery mode (nothing happend) and stuck!on the same image (recovery mode)
Btw, I just restore it with itunes to 1.1.3 again and ended with activation screen.

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Iam new here too, if you have time to take a look on some tuts and sticky, you will find out what you need, first; is that brand New in factory sealed, if yes, is many solution here or iclarified site ( hint: look for something..OTB), but if your phone is used and has upgraded/downgraded before, I have no idea, right now I have this problem.
I did great on my OTB 4.6 1.1.2 by the tut here on "How to Unlocked iphone for newbies.." but that is "old" now since there is ziphone...(ziphone is everywhere in iphone forums (that make my head "spinning")