Unlock iPhone 3G | Unlocking iPhone 3G with YellowSn0w | Step-by-Step Guide

How to Unlock iPhone 3G with YellowSn0w

In this iPhone tutorial, we will guide you on how to unlock iPhone 3G to make use of all carriers’ SIM card on your iPhone.

This guide is for iPhone 3G users ONLY. iPhone 2G users: Learn How to Unlock iPhone 2G.

Update for iPhone OS 3.0:

How to Jailbreak/Unlock iPhone 2G OS 3.0 (MAC)


You must Jailbreak your iPhone 3G in order to unlock iPhone 3G it.

Your iPhone  modem firmware (Baseband) must be on 2.28 which means you must be running iPhone Firmware 2.2 and in case of 2.2.1 it must be updated using PwnageTool (Not QuickPWN) that keeps Baseband at 2.28. Baseband at 2.28 is a must to have in order to follow this guide.

Learn How to check your iPhone Baseband version. If your iPhone Baseband version is 2.28 then you’re good to go. In Baseband 2.30 case, if your Bootloader version is 5.8 then you can downgrade Baseband from 2.30 to 2.28 and then Unlock your iPhone using this Guide.

Learn How to Check iPhone Bootloader version.

If you are on Baseband 2.30 and your iPhone Bootloader is NOT 5.8 then only hack available for you at the moment is to Jailbreak your iPhone 3G.


  • Hacking your iPhone could void its warranty.
  • Use this guide and try Quickpwn at your own risk.

Step 1

Launch the Cydia from your iPhone SpringBoard.
Step 2
Go to Manage tab available at the bottom.
Then Press the large Sources button.
Step 3
Press the Edit button available at the top right corner.
Then Press Add button available at the Top left side of the screen.
Step 4
Enter http://apt9.yellowsn0w.com as the Cydia/APT URL and press the Add Source button.
When adding Source process is complete, Press the big Return to Cydia button.

Step 5
Hit the Done button at the top right.
Step 6
Now Tap to select apt9.yellowsn0w.com from the list of sources.
Now select Yellowsn0w from the list of available packages.

Step 7
Now press Install button from the top right corner.
Then press Confirm from Top Right to Begin Installation.

Step 8
When you’re done with the installation, Press the big Return to Cydia Button.
Step 9
Press the Home button to return to SprinBoard. Then Hold down the power button for 3 seconds, a Power slider will appear . Slide to Power OFF your iPhone 3G.  Now again turn your iPhone 3G ON.

Enjoy the SIM of your Choice in your unlocked iPhone 3G.


If iPhone hasn’t detected your new carrier, try these:

  • turning off 3G
  • Toggling the Airplane Mode ON and OFF

Still out of Luck? Try reinserting your SIM card or insert a new SIM. or try resetting your Network Setting from Settings > General > Reset Menu

Still Having Trouble?

After trying above mention hints if you’re still out of luck/having troubles, you can simply uninstall Yellowsn0w from
Cydia > Manage > Packages.

Reboot after uninstalling. Your iPhone 3G will be back to normal locked condition.

Thanks to iPhone Dev-Team for such great work and helping out iPhone users.

Jailbreak iOS 4.0

Unlock iOS 4.0

Update 1: Jailbreak iOS 4 with PwnageTool

Update 2: Jailbreak iPhone 3GS iOS 4 with PwnageTool

Update 3: Jailbreak iPhone 3G iOS 4 with PwnageTool

Update 4: UltraSn0w 0.93: Unlock iPhone 3GS, 3G (All Baseband)

Update 5: Unlock iPhone 3G iOS 4 with UltraSn0w 0.93

Update 6: Unlock iPhone Baseband 05.13.04 with UltraSn0w 0.93

Update 7: Unlock iPhone Baseband 05.12.01 with UltraSn0w

Update 8:
UltraSn0w 1.0-1 is OUT now.
How to: Unlock iPhone 4 iOs 4.0.1 with UltraSn0w 1.0-1 Baseband 01.59.00

14 comments… add one
JROCKZ... May 21, 2009, 8:04 pm



super stuff

tommy May 23, 2009, 7:27 pm


Best web Site

Unlock iPhone 3.0 June 11, 2009, 9:08 pm

Nice guide.. do you know if this yellowsn0w app will work with the new 3.0 OS? It’s due out next week and it looks great, but I want to keep unlocked!??!

bodydetox July 30, 2009, 7:29 am

my iPhone was actually a gift from my girlfriend. i really love this phone and i think that this is the best phone that money can buy. i like the features and the design.

Martha August 24, 2009, 12:46 pm

the iPhone 3G looks very cool and feature packed. i will be saving some of my allowance to buy that phone.

arthritistreatment_techguy September 3, 2009, 3:01 pm

Iphone 3G is so packed of features and it really looks cool too. I own one iPhone 3G and i am planning to buy another one for my girlfriend.

Jana October 22, 2009, 8:50 am

Iphone 3G have the best features among all the phones that i have owned. the iPhone is also very classy and stylish.

ahmad October 24, 2009, 3:13 am

i have 3.1.2 can it work on it

kadir May 25, 2010, 6:44 pm

http://apt9.yellowsn0w.com is failed to fetch
server down

glip June 10, 2010, 1:45 am

Hi, is it possible to crack or unlock de 4G??? thanks!!

cool site!

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