iPhone Dev-Team has updated UltraSn0w unlock for iPhone 4, 3GS and 3G to version 1.1-1. UltraSn0w 1.1-1 fixes the poor standby battery life for all those who unlocked iPhone 4, 3GS or 3G with earlier UltraSn0w 1.0-1 version.

If your iPhone battery drains pretty fast even on standby after unlocking with UltraSn0w 1.0-1, then you’re advised to install UltraSn0w 1.1-1 update from Cydia.

ultrasn0w upgraded to version 1.1-1 we’ve tweaked a few things that may help with standby battery life, you can upgrade via Cydia.

Here are a couple of before & after screeshots shared by Sherif Hashim:

Just like the previous release, UltraSn0w 1.1-1 can unlock iPhone 4, 3GS and 3G running any firmware up to iOS 4.0.1 with baseband 01.59.00, 05.13.04, 05.12.01, 05.11.07, and 04.26.08.

via iphoneheat

UltraSn0w 1.0-1 is out to unlock for iPhone 4. This guide is on how to unlock iPhone 4 with UltraSn0w on iOS 4.0.1/4.0 baseband 01.59.00. iPhone 4 unlock instructions can be found below.

How to Unlock iPhone 4 with UltraSn0w

***T-Mobile USA users please disable 3G network first.

*** Settings >General >Network and turn the “Enable 3G” switch to OFF.

Assuming that your iPhone 4 is already jailbroken:

* Open the Cydia.
* Go to manage Tab at bottom.
* Hit the big Sources button.

• Hit the Edit button on Top-Right
• Then Hit the Add button on Top-Left
• Then Enter the following URL: http://repo666.ultrasn0w.com and hit the Add Source button.

• Once the Source is added to the Cydia, hit the big return to Cydia button at bottom of the screen and then Done button.
• Go to Search tab and search for ultrasn0w and install it.

Installing UltraSn0w will unlock iPhone 4 iOS 4.0.1, 4.0 with baseband 01.59.00. Once the installation is completed, reboot your iPhone 4.

Voila! You have unlocked iPhone 4 baseband 01.59.00 with UltraSn0w 1.0-1 and can use SIM from any carrier now.

via iphoneheat

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grow, grow ultrasn0w!
We’re happy to tell you that our ultrasn0w carrier unlock now supports the iPhone4!

Version 1.0-1 of ultrasn0w works for:

iPhone4 baseband 01.59
3G/3GS basebands 04.26.08, 05.11.07, 05.12.01 and 05.13.04
(If ultrasn0w doesn’t show when you search Cydia, add the repo:  repo666.ultrasn0w.com)

@planetbeing @MuscleNerd Thanks Guyz
For comments or questions, please use the comments section below.

From the first Ultrasn0w 1.0-1 screenshot it is clear that it can unlock

iPhone 4 Baseband 01.59.00 and

iPhone 3G/3GS 04.26.08(3.1.1), 05.11.07(3.1.2), 05.12.01(3.1.3) & 05.13.04 (iOS 4.0/4.0.1).

Meaning you will be able to unlock any firmware from 3.1.1 to 4.0.1.

It’s important that you save iPhone 3G/3GS & iPhone 4 4.0.1 SHSH Blobs, since JailbreakMe userland jailbreak will be blocked by Apple with new iOS update any time soon. Via Mobile-Geeks

Ultrasn0w 1.0-1 image was found in Hashim Sherif’s Photobucket album (deleted now).

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Planetbeing has been working on iPhone 4 Baseband day-and-night to find an exploit to develop an iPhone 4 unlock. Here’s what he had tweeted yesterday:

Today, MuscleNerd tweeted about an arbitrary code exec in iPhone 4 baseband:

and soon after MuscleNerd, Planetbeing said that Apple has added an anti-blacksn0w trick this time around but he has ever-growing bag of tricks though.

Now it’s clear that these guys are after iPhone 4 baseband unlock with full force to find an exploit and then develop an unlock for iPhone 4. We’ll keep you posted on future development. So, stay tuned!

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via iphoneheat.com