How to Unlock iPhone 3GS OS 3.1 With UltraSn0w

3 October 2009 by Vinay 11 Comments

These are instructions on how to software unlock the iPhone 3GS with OS 3.1 for use with any GSM cell phone carrier. Before you can follow these instructions you must have a jailbroken iPhone if you haven’t jailbreaked your iPhone 3GS then follow our Guide to How to Jailbreak iPhone 3GS on OS 3.1 Pwnage Tool (Mac) or How to Jailbreak iPhone 3GS 3.1 on Windows. For unlocking your iPhone UltraSn0w, a soft unlock payload from iPhone Dev Team is used. UltraSn0w is a small daemon that is launched on boot. It injects the payload at boot and also whenever there is a baseband reset. You won’t notice anything about it other than that your third-party sim now works. Once you have a Jailbreaked iPhone then you can use these easy steps to Unlock your iPhone.

Step One : Press to launch Cydia Installer from your Springboard.

Step Two : Press to select the Manage tab at the bottom of the screen.

Step Three : Press to select the large Sources button

Step Four : Press the Edit button at the top right of the screen.

Step Five : Press the Add button at the top left of the screen.

Step Six : Enter http://repo666.ultrasn0w.com/ as the source url and press the Add Source button.

Step Seven : Once the source has been added press the large Return to Cydia button.

Step Eight : Press the Done button at the top right of the screen.

Step Nine : Press to select http://repo666.ultrasn0w.com/ from the list of user entered sources.

Step Ten : Press to select ultrasn0w from the list of packages.

Step Eleven : Press the Install button at the top right of the screen.

Step Twelve : Press the Confirm button at the top right of the screen.

Step Thirteen : After installation completes successfully press the large Return to Cydia button.

Step Fourteen : Now press the Home button then power off and power on the iPhone. You do this by holding down the power button for 3 seconds then moving the power slider that appears to the right. Press the power button again to turn on the phone.

Step Fifteen : You should now be able to insert the SIM of your choice!

11 Comments »

gaksu said:

So 3gs with 3.1 can unlock as far as i understand.What about 3g with 3.1? Is there any hope with 3g unlock?

# 3 October 2009 at 10:05 pm

Vinay (author) said:

@Gaksu Unlock 3G with the same procedure but your baseband should be 4.26.08

# 3 October 2009 at 10:08 pm

DIno said:

Please advise me, how do i check my Baseband version if my 3GS it is LOCKED? my iPhone is only showing the connect to USB Itunes LOGO and i am stuck there. My 3GS was accidentally upgraded to 3.1 and was locked.

# 4 October 2009 at 6:16 am

Robert said:

Will this work on OTB 3.1′s that will (Hopefully)be JB with greenpois0n? Does the baseband version matter for this? Thanks.

# 4 October 2009 at 1:12 pm

canneo said:

Canneo says;( toVinay ;
i am so much disappinted now, every new tool or method that comes out why am i on the category that says “you are out of luck”.

Vinay, is the D Team working on a solution for the third catagory also. or will this be it..

thanx.. JUSTİCE FOR ALL
???

# 5 October 2009 at 7:11 am

Kathy Goodman said:

Darn it! I’m in the “out of luck” category too. This must be really hard to try to figure out for the Dev Team. We’re cheering for you guys, we know you can do it!

# 5 October 2009 at 8:44 pm

canneo said:

Canneo says;( toVinay ;
i am so much disappinted now, every new tool or method that comes out why am i on the category that says “you are out of luck”.

Vinay, is the D Team working on a solution for the third catagory also. or will this be it..

thanx JUSTİCE FOR ALL

# 7 October 2009 at 7:26 pm

a-Bizzle said:

Ive successfully followed the options and my phone is jailbroken on 3.1. I then went on Itunes to restore all my data, only to find a newer version of the operating system is available, 3.1.2. The problem is that when in Itunes I can’t restore my data without updating too. so, is 3.1.2 safe for a Jailbroken phone?

# 8 October 2009 at 11:05 pm

Al said:

Hi. im not sure if i got this right ?

im thinking to buy the new Iphone 3GS,

Im living in sweden, and the phone is lockt to Telia. i want to use onother sim card.

with this Fourteen steps ? is it 120 % guarantee that i can use onother sim card ? is this only for mac users ?

# 9 October 2009 at 4:32 pm

Qais said:

Please advise me, how do i downgrade my Baseband version if my 3GS it is LOCKED? my iPhone is only showing the connect to USB Itunes LOGO and i am stuck there. My 3GS was accidentally upgraded to 3.1 and was locked.

# 24 October 2009 at 2:44 am