Ask Different is a question and answer site for power users of Apple hardware and software. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I recently updated my iPhone 3GS to iOS 5.0.1, and the baseband got updated to 06.15.00. I jailbroke it using redsn0w 0.9.10b1.

Now no matter what I try, I'm not able to unlock my iPhone. I tried installing Ultrasn0w, but that's not working.

I suspect that this is happening since I didnt preserve the baseband.

I'd be very very thankful if anyone can tell me how to proceed right now. I'm stuck and I'm really in need of help. Please.

share|improve this question
Be careful! If your 3GS was made after the 30th or so week of 2011, you will brick your 3GS by flashing to 06.15.00 – user18444 Feb 8 '12 at 20:25

I've used this tutorial before. In fact, I'm using it right now to unlock my boss's iPhone.

share|improve this answer

Be sure to enable the option "Install iPad baseband" in redsn0w first before running ultasn0w - note that because you are already on 06.15.00 without preserving your baseband, can not go back. Using Ultrasn0w may also cause you to lose GPS functionality. As a general note, be very careful with future updates.

share|improve this answer
Will any version of redsn0w do? Or should I download the latest version? – Koundinya Vajjha Feb 5 '12 at 10:00
I'm asking this because I enabled the "Install iPad baseband" after an unseccesful unlock attempt first. But even then I wasn't able to unlock my iPhone... – Koundinya Vajjha Feb 5 '12 at 10:01
You'd probably want the latest version of redsn0w. Re run the latest version with install iPad baseband enabled. Then you should see Cydia installed. Within Cydia download and install ultrasn0w – osx86x Feb 6 '12 at 20:00

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.