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Download Ultrasn0w 1.2.5 to Unlock iPhone 4/3GS on iOS 5.0.1

When it comes to unlocking the iPhone, definitely one of the best and popular solution is iPhone Dev-Team's Ultrasn0w. And now everyone's favorite unlock tool has just received an update. Ultrasn0w 1.2.5 is now available in Cydia.

Ultrasn0w 1.2.5
This Ultrasn0w update is specifically for bringing in support for Apple's latest public firmware version, the iOS 5.0.1. If you have been using Ultrasn0w for quite some time now, then you should know the drill. Before you can use this tool, you need to have an unlockable baseband. But as long as you have the requirements, you should be able to unlock your iPhone 4 and iPhone 3GS running on iOS 5.0.1. Here are the supported basebands of Ultrasn0w 1.2.5.
Ultrasn0w 1.2.5 for iOS 5.0.1

iPhone 4

  • 01.59.00

iPhone 3GS

  • 04.26.08
  • 05.11.07
  • 05.12.01
  • 05.13.04
  • 06.15.00

As you can see, this new version of Ultrasn0w does not offer anything new with regards to baseband compatibility. In addition to that, it only supports iPhone 3GS and iPhone 4. Since the iPhone 4S has yet to be jailbroken, using Ultrasn0w on the device is simply not possible. But there have been buzzes that a jailbreak for the iPhone 4S will be released soon. If that is the case, then expect an Ultrasn0w update to follow.

NOTE: The only way that you can update to iOS 5.0.1 while preserving your unlockable baseband is to create a custom IPSW using the latest version of Redsn0w or Sn0wbreeze. iPhone Dev-Team frontman MuscleNerd has also advised iPhone 3GS users with old bootrom to apply Redsn0w 0.9.9b9d prior to installing the Ultrasn0w compatibility updated.
MuscleNerd Tweet Ultrasn0w 1.2.5

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    Raza Jawad9 years, 6 months ago

    Hi everyone – is there unlock available or which version of ultrasnow will work for iphone 4, IOS: 5.0.1 with baseband (preserved): 03.10.01

    Shahul4449 years, 6 months ago

    any latest news about iphone4 ios 5.0.1 baseband 4.11.08

      Pesmerga9 years, 6 months ago


      As of now, there is no notable news yet. :(

    Ericson_mboiz9 years, 7 months ago

    hi, i got iphone4s from london, but simlock, how to unlock the simcard, i use here in kuwait & other country… thanks!!!

    Raj9 years, 7 months ago

    want to unlock iPhone 4s (got from US;  locked with AT&T )  for Indian operators……

    need help!!!

    Thanks in advance …


      Pesmerga9 years, 7 months ago


      There is no unlock for the iPhone 4S now, watch out for GEVEY Ultra S though, it will be available in March.

    Ozamora769 years, 8 months ago

    Any news on when the unlock for iPhone 4S will be available?


      Pesmerga9 years, 8 months ago


      There are products like TPSIM that are floating around that allegedly can unlock the iPhone 4S but it is not yet proven to be effective. As for a software unlock, there are no notable news about it.

    Nadertomas839 years, 8 months ago

    very gooooooooooooooooooooooooooood

    John9 years, 9 months ago

    I updated to 1.2.5 from 1.2.3 and now my phone does not recognize the sim card.