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The particular brief answer is yes. You might use the jailbreak system greenpois0n download   for use on your Windows PC as it is a simple and convenient course of action. You will only must update your 3GS after which jailbreak it. Remember to do as instructed below to understand ways to take action.

Note: It’s an untethered jailbreak meant for Apple Iphone 3GS using the brand new firmware 4.2.1 done with the latest variant of greenpois0n (RC 5) microsoft windows jailbreak tool. To begin withof the a small guide: when you’ve got a previously jailbroke iPhone 3GS you mustn’t make use of this solution. If you ever upgrade thru iTunes it’s going to change your baseband, and you’ll be forced to utilize iPad baseband strategy that may be troublesome occasionally.

If you have never protected the shsh blobs you cannot jailbreak with GreenPois0n. Folks which do not currently have shsh blobs wont be able to restore to 4.1 firmware.

GreenPois0n jailbreak steps:

1. Listed here are the required downloads: Follow the link to download GreenPois0n for Windows PC. Down load the 4.2.1 firmware for iPhone 3GS here: Download Tiny Umbrella for Home Windows in this case.

2. Upgrade your iTunes in case you have later model. Start off iTunes and plug in your iPhone to the laptop or computer. As soon as iPhone had identified up-date the firmware variation by holding shift and clicking on upgrade. The moment prompted, choose the ipsw you’ve previously downloaded (take note: download the file with Firefox browser, you should not unzip it!)

3. Should you see the 1013 error do not fret. Click OK

4. Begin Tiny Umbrella and select the “Exit Recovery” selection. Your iPhone 3gs will restart now and you will probably begin to see the emergency call screen and hookup to itunes message. De-activate your iPhone as well as begin GreenPois0n

5. Once again place your iPhone into DFU mode following the instructions

6. When ever greenpois0n acknowledges your iPhone in DFU mode it will start off jailbreaking it. Please delay until this is done.

7. As soon as the jailbreak is done your iPhone will begin and you should start to see the Loader app on your own screen.

8. Tapp the Loader app and pick Cydia. Your current jailbreak was effective. Your 3GS iPhone with 4.2.1 firmware comes with an untethered jailbreak.

Added alternative: If you wish to carry out a greenpoison download unlock together with to jailbreak you will now really need to set up the Ultrasn0w unlock. Tap Cydia and search for Ultrasn0w. Whenever you get please make sure to install it and you will have your iPhone 3gs will be unlocked. That is all men and women, now you’ve got a entirely jailbroken, service provider unlocked Apple iPhone 3gs within the 6.15.00 iPad baseband.