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Ultrasnow 1.2.3 Unlocks iPhone 4, iPhone 3GS, iPhone 3G on iOS 4.3.5

iPhone-Dev Team have developed Ultrasnow 1.2.3 which can unlock iPhone with following baseband,

  • iPhone 4 – Baseband 01.59.00
  • iPhone 3GS & 3G – Baseband 04.26.08, 05.11.07, 05.12.01, 05.13.04 and 06.15.00
Whats needed
  1. Open Cydia
  2. Goto Manage > Sources
  3. Edit and Add source “repo666.ultrasn0w.com”
  4. After the source has been added. Search for Ultrasn0w
  5. Open Ultrasnow 1.2.3
  6. Install Ultrasn0w 1.2.3
  7. After ultrasn0w is successfully installed restart the iPhone and here you go your carrier has started appearing means its successfully unlocked.
If you want to upgrade your iPhone to 4.3.5 and preserve the baseband visit here, to downgrade using SHSH blobs TinyUmbrella visit here, to Jailbreak visit TinyUmbrellaSnowBreezePwnageToolRedsn0w or JailbreakMe.
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