Unlock iOS 4.0

Apple has pushed the iOS 4 (formerly iPhone OS 4.0) for both the iPhone and iPod Touch to the developers. iOS 4.0 firmware will be released to general public on June 21st. Dev-Team has already released UltraSn0w unlock for iOS 4.0 GM on Baseband 04.26.08. BlackSn0w RC2 had already unlocked iPhone 3GS running iOS 4.0 firmware on Baseband 05.11.07.

unlock ios 4.0With the release on UltraSn0w 0.92.1, Dev-Team has said that they have UltraSn0w unlock ready for both 05.12.01 baseband at OS 3.1.3 and the all new baseband 05.13 of iOS 4.0 and iPhone 4 as well. They are holding it until the iPhone 4 hits the shelves. So, a couple of weeks to go.

All the iOS 4 unlock guides will be listed below. So bookmark this page for future reference. We’ll update this post as soon as a new unlock iOS 4 guide is published on iPhoneHeat.com. Checkout the guides listed below to unlock iOS 4.0 on iPhone 3GS, 3G.

NOTE: In order to Unlock your iPhone 3GS, 3G running iOS 4.0, it must be jailbroken. You can fine iOS 4.0 jailbreak guides here:

UNLOCK iOS 4.0 FIRMWARE

All the iOS 4.0 firmware unlock guides are listed under the concerned devices. Scroll down to your iDevice and follow the links listed under it to unlock your iPhone 3G, 3GS running iOS 4 firmware.

Unlock iPhone 4

Unlock iPhone 3GS

You can unlock iPhone 3GS iOS 4 GM firmware with both Ultrasn0w and BlackSn0w depending on your baseband (Check baseband: Settings> General> About> Modem Firmware). In order to do so, follow the step by step guide:

Unlock iPhone 3GS baseband 05.13.04

Unlock iPhone 3GS baseband 05.12.01

Unlock iPhone 3GS Baseband 05.11.07

Unlock iPhone 3GS Baseband 04.28.06

Unlock  iPhone 3G

You can unlock iPhone 3G iOS 4 GM firmware with both Ultrasn0w and BlackSn0w depending on your baseband (Check baseband: Settings> General> About> Modem Firmware). In order to do so, follow the step by step guide:

Unlock iPhone 3G Baseband 05.13.04

Unlock iPhone 3G baseband 05.12.01

Unlock iPhone 3G Baseband 05.11.07

Unlock iPhone 3G Baseband 04.28.06

***We’ll update this post as soon as more jailbreak tools are updated to jailbreak iOS 4 firmware.***

Update 1:

UltraSn0w 1.0-1 is OUT now.
How to: Unlock iPhone 4 iOs 4.0.1 Baseband 01.59.00 with UltraSn0w 1.0-1
unlock iPhone 4

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7 comments… add one

AfRoo June 19, 2010, 2:49 pm

Gosh, Can’t wait 4 it :D

MFJ June 19, 2010, 9:38 pm

plz hurry!!!!

feti July 26, 2010, 3:16 pm

Hey I was wondering if anyone knows how to unlock an Iphone 3g with os 4.0.1?

iPhoneHeat July 26, 2010, 6:14 pm

install UltraSn0w 0.93

Mohsinv7 October 14, 2010, 5:59 pm

Sir i have installed 4.1 with out backing it up and my iphone 4 waz software unlocked before now i have installed the cydia but it says invalid sim

iPhoneHeat October 15, 2010, 3:52 am

wait for UltraSn0w update

44325 August 5, 2011, 4:15 pm

hello, can someone please help me. My iphone 3g won’t turn on. I know how to restore my iphone, but what is the best firmware for my iphone 3g? What is the best option?

Thank you.

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