What is the unlock via Ultrasn0w 04.11.08 baseband iPhone 4 or downgrade to 01.59.00 possibility? In other words “After upgrading iPhone 4 to iOS 5 no network problem”

One of our readers asked us this question, so that we are going to make this clear in this article. As you know that Apple released iOS 5 for iPhone, iPod touch and iPad on October 12.

Ultrasn0w 04.11.08

Many of iPhone 4 users who are relying on unlock with ultrasn0w or Gevey SIM updated their iPhone 4 to stock iOS 5 ipsw firmware, here’s the problem exactly.

How to Unlock 04.11.08 Baseband / Downgrade to 01.59.00 iPhone 4 Possibility?

When users upgrade iPhone 4 to stock iOS 5, the baseband (modem firmware) is updated to version 4.11.08 which is not supported with the current version of ultrsn0w and also can’t be unlocked with the current Gevey SIM models (Standard, pro, ultra and etc.). So in case you upgraded your iPhone 4 to stock iOS 5 you will no longer able to unlock iPhone 4 with ultrasn0w or Gevey SIM.

So that we recommend iPhone 4 users who rely on unlock with Gevey SIM or ultrasn0w and wanna upgrade their iPhone 4 to iOS 5 to use custom ipsw to preserve the unlockable baseband, so that you will be able to use Gevey SIM or ultrasn0w to unlock your iPhone 4.

Downgrade Baseband 04.11.08 to 01.59.00 iPhone 4 – Any of hacker working on this ?

No, there’s no one work on downgrade 4.11.08 to 1.59.00 baseband. So don’t trust any of the scam sites that claiming the ability of downgrade 4.11.08 to 1.59.00 baseband.

Ultrasn0w 04.11.08 baseband iPhone 4 – What can I do?

If you already stuck on Ultrasn0w 4.11.08 baseband on iPhone 4, you have to wait for updated version of ultrsn0w to support 4.11.08 baseband or modified version of Gevey SIM to support this baseband.

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Stephan Popov
When iDevice users experience problems with the iOS software or unlocking, it is not uncommon for their lives to unravel. My passion is providing answers to your problems. I help iPhone, iPad and iPod Touch users by recommending fixes for common iOS bugs and tools that improves your experience. I conduct in-depth research for every topic i cover on this blog, to ensure that I cover everything Apple users need to troubleshoot their issues. When not writing for UnlockBoot, i enjoy swimming in my backyard pool. P.S. i prefers the Maldives for holidays. Connect with me on Facebook, Google Plus and Twitter.