HowTo Jailbreak iOS 4.2.1 & Preserve Baseband [Sn0wbreeze]/use with UltraSn0w Unlock

APRIL 4th UPDATED : iOS 4.3.1 jb now available here
http://www.youtube.com/watch?v=z8EyxqVgpoc

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Recommended for : Ultrasn0w unlocked users who want to maintain their baseband but want to update to the newest iOS firmware 4.2.1 (if this doesn't sound like you, why not just use the EASY 1 click alternative here http://www.youtube.com/watch?v=mpBh94nGBps)

Sn0wbreeze (for Win): http://tinyurl.com/49ks5rr
PwnageTool (for OSX): http://tinyurl.com/6a4mh5o

If you get 16XX error do this : http://www.redmondpie.com/how-to-fix-1604-1601-1600-16xx-error-during-ios-4.2...
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Special Thanks to
- iPhone Dev Team for PwnageTool
- iH8sn0w for Sn0wbreeze
- Chronic Dev team for exploit

http://facebook.com/iPhoneArena
http://twitter.com/iPhoneArena

NOTES :
-This works for iPhone 3gs, 3g, 4, Verizon 4
- you can also use this for iPhones with flashed 06.15 baseband so you can restore with this cfw.

Category:

Science & Technology

Tags:

• how
• to
• jailbreak
• ios
• firmware
• 4.2.1
• without
• updating
• baseband
• 03.15
• 01.59
• 02.10
• preserving
• unlock
• sn0wbreeze
• pwnagetool
• download
• cydia
• install
• redmondpie
• iphonearena
• iphone
• 3gs
• ipod
• touch
• 06.15
• 05.13
• 05.14
• snowbreeze
• pwnage
• chocolate
• snow
• verizon

[WarmHeartedLove17]

Is this Tethered or untethered? 

[SpacedOutPurp]

Where do you get ultrasn0w????

[XVurrux]

i have a 1604 error cuz of this

[XVurrux]

thanks now my ipod is broken cause of that!

[vvvvali]

What? You are using the LATEST modem firmware there, what have you preserved?

[prowessonline]

Pls i want to upgrade 3GS from 3.1.3 to any iOS and preserve baseband 02 10.01 , is this possible. Or what can do as i need to unlock it as well.Thanks

[FIFA20Lover]

hey if you are having trouble with jailbreaking just go to my videos and click on the on e about iphone jailbreak. i guarantee you will jailbreak your phone,tablet, or ipod. very safe

[Atr1d1s]

i download the ios 4.2.1 archive but it is a .zip file and it can't be recognized by sn0wbreeze,,,also i have tried every jailbreaking method and nothing works...my iphone is 3g 16gb with 4.2.1 (8C148) iOS please tell me what to do to jailbreak it,thanks.

[MatticusPrime1]

This worked great for my 3G 3.1.2 -->4.2.1. Thanks for the video!

[sasauvy]

@rileyisgangsta im pretty sure it wont becuase it is not made for the version 5.0.1