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Once you have jailbroken and updated to ipad baseband 06.15.00 unlocking you iphone is fairly simple.

1. Open cydia and choose user when asked

cydia installed iphone 3g 3gs

user type cydia

2. Update Essentials when asked, when done cydia will restart just go back to cydia when it does

cydia update essentials iphone 3gs 3g

updating cydia database

cydia updating iphone 3gs 3g

3.Once cydia is updated it should restart springboard (cydia) just go back to it, on the bottom you will see sections go to manage, then select sources, once in sources select repo666 and install ultraSn0w

manage sources cydia

cydia repo66 ultrasnow

install ultrasnow to unlock iphone 3gs 3g

3.Once you click ultrasnow you should see  a black screen installing it, at the end you will see on the bottom reboot device touch it for it to restart. This is the part where I enter a gsm sim card thats not ATT, I use T-Mobile, or Simple mobile. When it restarts it should say waiting for activation, be patient it takes  a few minutes then you should see iPhone Activated. And thats it you have a gsm unlocked iPhone.

installing ultrasnow to unlock iphone 3g 3gs

iphone waiting for activation

iphone activated unlocked 3gs 3g

as you can see the time in waiting for activation and activated are different is because I actually unlocked two phones and on the first one forgot to take a picture when it was it was waiting for activation.

Congratulations you have an unlocked iphone 3g 3gs

To unlock an iPhone first you have to jailbreak it. You need to make sure exactly what you want to do, when unlocking a phone  you will have to change the baseband from whatever it is to 06.15.00 the ipad baseband. Apple does know about this glitch and does not let you update regularly through itunes, if you do and have the0 6.15.00 baseband and you try to update you will get an error.  If you just want to jailbreak it you don’t need to update to ipad baseband and can update regularly through itunes.

Necessary software:

RedSn0w

IPSW for the specific OS version I am on 4.2.1 but this tutorial should be good  up to atleast 4.3.3

iphone about screen

iPhone 3G and 3GS use different IPSW make sure to download the right one.

This is where I get my IPSW from http://www.iclarified.com/entry/index.php?enid=750

if it says iphone1,2 = iphone 3g  iphone 2,1= iphone 3gs. Make sure to download the right one.

Grab redsnow from the internet and make sure to put it all in the same folder or atleast where you know where it is at.

jailbreaking iphone folder

1.  Once you got everything in order click on redsnow, browse to your corresponding IPSW (should be the same version as your OS).

Once RedSn0w identifies it  you should see this

Jailbreaking unlocking iphone 1

2. Once RedSn0w  successfully identifies the IPSW click next for the 3G you should see this screen, the 3GS gives you same screen with much less options but the ones that matter are “install Cydia” and “install iPad Baseband”. Install cydia is just for jailbreaking, if you need to unlock it to use your phone with any GSM Carrier you need to update the baseband too.  This tutorial were going all the way make sure to check both.  And turn your phone off. By holding power button(top right hand corner).

3.You will be told  to turn off your device, it should be off already on this part you need to make sure you know a bit  of phone anatomy. Power button is top right, the home button is the button on the bottom center of the screen.  Once you know this continue, it should tell you to  hold powerbutton 3seconds, then click and hold the home button for about 10seconds and finally release powerbutton and keep holding the home button until it goes into dfu mode.

jailbreaking unlocking iphone 3

4. During DFU mode, you should see the pineapple and computer loading into the phone screen just wait until the phone finishes downloading and installing cydia. Dont disconnect until it says done, but even then i keep it connected.  It should restart by itself and when you go to settings about should be able to see your  baseband updated to ipad baseband.

jailbroken iphone 3gs 3g about screen

On your home Screen you should see Cydia already installed

cydia installed on 3g 3gs iphone

Congratulations you have just jailbroken your iPhone with the possibility of unlocking it which is what we will do next.