Guide to unlock iPhone 3.1.2 Firmware with blacksn0w

by Harshad on November 6, 2009

iPhone Blacksn0w has already been released by GeoHot on November 4th. For those who don’t know anything about blacksn0w, it is an unlocking tool developed by popular iPhone developer GeoHot. It helps iPhone to unlock baseband 05.11.07 on iPhone 3.1.2 firmware.

I have already posted a simple guide to jailbreak the iPhone firmware 3.1.2 using blackra1n RC3. You can use this guide to jailbreak your phone and then use following guide to unlock the latest firmware.

Guide to unlock iPhone 3.1.2 with blacksn0w

1. Follow the iPhone 3.1.2 jailbreaking steps given here and install Cydia from blackra1n app.

2. Open Cydia application.

3. Select Manage and go to Sources.

4. Go to Edit and Add following repo.

Repo: http://blackra1n.com

5. Cydia will install the repo. Open it and install blacksn0w.

6. Restart iPhone.

You’re done. Enjoy your unlocked iPhone.

There is another method to unlock iPhone 3.1.2. Check out the following steps.

Steps to follow:

1. Open blackra1n app.

2. Select ‘sn0w’ to install on your iPhone.

3. That’s it. The sn0w tool will automatically unlock iPhone 3.1.2 firmware.

If you have any doubt, feel free to ask in comment section below. I will try to solve them.

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Tagged as: Blackra1n, Blacksn0w, iphone, iPhone 3G, iPhone 3GS, sn0w

{ 8 comments }

josue November 9, 2009 at 10:47 am

hey i just have a question, after jailbreaking and unlocking my iphone what will happen when the next firmware update comes out, will it overwrite the jailbreak and unlock?

thnks

Harshad November 16, 2009 at 10:08 pm: Once you update to next firmware, you’ll have to jailbreak and unlock it again.

mark November 9, 2009 at 11:08 am

Hi-

I followed the jailbreak steps- worked fine. I am pretty sure I followed the unlock steps but it won’t unlock. I then tried the alternate suggestion but when I start blackra1n on my PC it only says “make it rain”, I can’t find any “snow” under the app.

Forwarded:

There is another method to unlock iPhone 3.1.2. Check out the following steps.

Steps to follow:

1. Open blackra1n app.

2. Select ‘sn0w’ to install on your iPhone.

3. That’s it. The sn0w tool will automatically unlock iPhone 3.1.2 firmware.

If you have any doubt, feel free to ask in comment section below. I will try to solve them.

Can you help?

Thanks

koetsu13

Harshad November 16, 2009 at 10:09 pm: Dude, open that app on your iPhone and then follow the steps.

Chris November 17, 2009 at 10:31 am

I understand that the jailbreak (and thus unlock by default) only last as long as the phone remains on? I hear if you let the battery die and or shut your phone off and restart it, you lost the jailbreak (and thus unlock) and have to re-do the process.

Its called a “teathered jailbreak.”

Can anyone confirm this?

Harshad November 17, 2009 at 5:33 pm: No, it’s not true.

Ed January 7, 2010 at 9:04 pm

I’ve unlock my iphone 2g with blackra1n but only allows me to download cydia and r0ck… the sn0w is missing. everytime I switch my sim card from att to a diffent sim the iphone will show the “sync to itunes” icons (emergency calls only). is there another way to download black sn0w?

Fernando March 31, 2010 at 10:16 pm