Help with jailbreaking and Cydia for iPhones, iPads, and iPod touches.

Pangu provides an iOS 9.0 untethered jailbreak. TaiG provides an iOS 8.4 and 8.3 untethered jailbreak.
Check @PanguTeam, @taig_jailbreak, @saurik, and /r/jailbreak for news and updates.
You can use Cydia Impactor if you need to un-jailbreak an 8.1-8.4 device without restoring.
Instructions for jailbreaking iOS 8.0-8.4.
Before asking a question, check Frequently Asked Questions to find quick answers!
How to fix some mysterious problems.

Since apple had stopped signing 4.2.1 firmware, how do I restore to 4.2.1 firmware on my iphone 4 4.2.1 jailbroken with greenpois0n. I have shsh saved on TU and Cydia. Thank you.

asked 20 Mar '11, 03:51

cvliew's gravatar image


You can start TU and start the TSS server, this will respond backto iTunes during the restore to 4.2.1

To start the restore in iTune, hold the SHIFT key and click the RESTORE button, then select the 4.2.1 firmware that you should have downloaded. Links to all firmwares can be found here


answered 20 Mar '11, 03:53

knightz4u's gravatar image


Do I have to edit my Hosts folder?

(20 Mar '11, 04:05) cvliew cvliew's gravatar image

I just want to restore to 4.2.1 and don't want to upgarde my Baseband

(20 Mar '11, 04:10) cvliew cvliew's gravatar image

TSS server will take care of that.

(20 Mar '11, 04:15) spockers ♦♦ spockers's gravatar image

TinyUmbrella will prevent baseband upgrades for iPhone 4 only, for iPhone 3G/3GS you need to use custom firmware by either sn0wbreeze (windows) or PwnageTool (Mac).

If you use TinyUmbrella, then you don't need to do the change directly to the hosts file, check the advanced tab of TU to do this for you and apply this change when TU is shut down.

(20 Mar '11, 04:52) knightz4u knightz4u's gravatar image

The link above is custom firmware or official firmware? What is the different between CFW and OFW? Which FW shall I use in order to restore fresh on my iphone 4 4.2.1 BB 03.10.01 jailbroken with Greenpois0n.

Thanks for the help.

(20 Mar '11, 05:07) cvliew cvliew's gravatar image

OFW becomes customized when using sn0wbreeze by mainly removing the baseband update and adding Cydia and perhaps a few tweaks.

BB3.10.01 is the one bundled with 4.2.1 therefore to preserve it you only need an OFW.

The link above is pointing to Apple website and therefore is the OFW.

(20 Mar '11, 05:45) knightz4u knightz4u's gravatar image

To jailbreak your iPhone 4 the GP way, restore fresh with TU SHSH keys to 4.2.1 and then run GP.

Alternative to use Sn0wbreeze 2.2.1 to build a jailbroken CFW and restore that that one (restoring to CFW can only be donw after putting your device in Pwned DFU mode at the end of Sn0wbreeze process or using iReb from the same developer @ih8sn0w)

(20 Mar '11, 05:47) knightz4u knightz4u's gravatar image
Your answer: (please use the "add new comment" button unless you are actually answering the original question)
toggle preview

Markdown Basics

  • *italic* or _italic_
  • **bold** or __bold__
  • link:[text]( "Title")
  • image?![alt text](/path/img.jpg "Title")
  • numbered list: 1. Foo 2. Bar
  • to add a line break simply add two spaces to where you would like the new line to be.
  • basic HTML tags are also supported


Asked: 20 Mar '11, 03:51

Seen: 642 times

Last updated: 20 Mar '11, 05:47

Related questions

JailbreakQA is by chpwn and comex.
About JailbreakQA. Powered by OSQA.