Unlock iOS 4.3 Ultrasn0w iPhone 4 3GS After Sn0wbreeze 2.3 Jailbreak

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by casey on March 20, 2011

As we have updated you, Sn0wbreeze 2.3 beta 4 has been released. The tool is compatible with Ultrasn0w unlock for iPhone 4 and iPhone 3GS operating on the iOS 4.3 firmware. We are here to show you a HOW TO GUIDE as promised.

Things you need to know before you proceed:

ultrasn0w now works for basebands (01.59.00 / 04.26.08 / 05.11.07 / 05.12.01 / 05.13.04 / 06.15.00)
ultrasn0w is NOT compatible with the folllowing basebands! (02.10.04 / 03.10.01 / 04.10.01 / 05.14.02 / 05.15.04)
Upgrading your iPhone 3GS baseband to the 06.15.00 iPad baseband hack to unlock MAY cause you to lose your GPS!

IMPORTANT NOTE ONLY FOR iPHONE 3GS USERS: You MUST HAVE your 3GS device updated to 06.15.00 Baseband for Unlock. For this you have to follow one of the following guides:

After you have checked and performed all the pre-requisites above, follow the guide below.

STEP 1: (Jailbreak Phase)

Sn0wbreeze-2.3b4

STEP 2: (Unlock Phase)

  • Now you have jailbroken using sn0wbreeze 2.3, now you have to unlock your device.
  • Launch Cydia on your iPhone 3GS or iPhone 4 device.
  • Select ‘Manage’ at the bottom.
  • Select ‘Sources’ in the center.

Ultrasn0w unlock 1.2 -1

  • Press ‘Edit’ and then ‘Add’.
  • Now enter the URL “http://repo666.ultrasn0w.com” and press ‘Add Source’

Ultrasn0w unlock 1.2 -2

  • Let Cydia perform few automated steps.
  • After installation is finished. Find ‘Ultrasn0w 1.2′ in Cydia and Install it.

Ultrasn0w unlock 1.2 -3

 

  • Restart your device after the installation.

Ultrasn0w unlock 1.2 -5

Congratulations! Have fun with jailbroken and unlocked iPhone 4 or 3GS running the latest iOS 4.3.

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  • Jmandevil

    im new to iphone.i just updated and have an iphone 3gs 16g ios 4.3 modem software 05.16.01.can this iphone ever be unlocked

  • Ruaankeraaz

    ruaankeraaznyes u can install ipad baseband 6.15 then unlock with ultrasn0w .2nhope u know the procedure

  • Menocollege

    I’m confused. The article says you can use this to unlock iPhone 4, but the baseband for the 4 with ios 4.3 is 4.10.01, which is not compatible with this software. Any tips?

  • Aun08002

    If I do what they said , will it upgrade my 01.59.10 baseband . Just don’t want to loose it . Thanks for make it clear

  • Sepehr-kk

    ok i did all the steps and i did jailbreak it, but theres a problem…. i lost everything i had like my contacts pictures songs and my pho es dead no data plan, nothing works i cant even connect to fido my network doesnt work, so basicly my iphone 4.3 is like an ipod now. i tried restoring my backup but it gives me errors i dont know how to fix it

  • Jamer_m22

    thakz for d guide. now my device jailbroken and unlocked

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