How to Jailbreak iPhone 4, 3GS iOS 5.1 with RedSn0w - iPhoneHeat

How to Jailbreak iPhone 4, 3GS iOS 5.1 with RedSn0w

RedSn0w 0.9.10b6 is available to jailbreak iPhone 4 and iPhone 3GS on iOS 5.1. In this guide you will learn how to jailbreak iPhone 4, iPhone 3GS running iOS 5.1 tethered. Hit the jump for step-by-step instructions to jailbreak iOS 5.1 on iPhone 3GS and iPhone 4…

Apple pushed iOS 5.1 firmware for iPhone, iPad and iPod Touch yesterday. Thanks to the iPhone Dev-Team for RedSn0w 0.9.10b6 which jailbreaks iOS 5.1 on iPhone 4, iPhone 3GS, iPad 1 and iPod Touch 4G, 3G.


  • It’s a tethered jailbreak which requires you to connect your device to your computer, every time you reboot your device, and use “Just Boot” feature in RedSn0w to boot in into jailbreak mode. If you turn on the device without using “Just Boot” feature, jailbreak apps won’t work (neither will Safari).
  • Untethered jailbreak for iPhone 3GS (old Bootrom).
  • UltraSn0w unlockers MUST create a custom firmware with RedSn0w and then jailbreak using this guide.
  • iPod Touch and iPad users follow these guides:

Let’s jailbreak iPhone 4 and iPhone 3GS iOS 5.1 with RedSn0w…

How to Jailbreak iPhone 4, 3GS iOS 5.1 with RedSn0w

Step 1

Download iOS 5.1
Download RedSn0w 0.9.10b6
Download iTunes 10.6

First of all backup your iPhone 4 or iPhone 3GS personal data via iTunes before restoring to iOS 5.1.

Attention iPhone Unlockers

UltraSn0w or Gevey SIM dependent iPhone users MUST preserve their baseband before restoring iOS 5.0.1. You can do that by creating a custom firmware with RedSn0w. Here’s how to do it: How to: create custom firmware with RedSn0w *** iPhone unlock dependent users MUST always use custom firmware instead of Stock iOS firmware.

Step 2

Connect your iPhone 4 or iPhone 3GS to your computer, open iTunes, hold down the Shift (Windows) or Alt/Option (Mac) key and hit the Restore button on iTunes and then browse and select the downloaded iOS 5.1 IPSW file (Unlockers MUST use Custom Firmware).

Step 3

After restoring process has completed; Run RedSn0w; Click Jailbreak; Now make sure your iPhone, iPad or iPod Touch is turned OFF and Plugged in to your computer. Hit Next.

redsn0w 5.1 jailbreak iphone (8)redsn0w 5.1 jailbreak iphone (6)

Step 4

Now follow the on-screen instructions to enter your device in DFU mode.

  1. Hold Down The Power (Corner) button for 3 Seconds
  2. Without releasing the Power button, also hold down the Home (Bottom Center) button for 10 seconds
  3. Without releasing the Home button, release the Power button BUT KEEP holding the Home button for 15 seconds

redsn0w 5.1 jailbreak iphone (5)redsn0w 5.1 jailbreak iphone (4)redsn0w 5.1 jailbreak iphone (3)

Step 5

Once your iPhone 4 or iPhone 3GS is in DFU Mode, check “Install Cydia” and hit the next button. RedSn0w will start jailbreaking it, which should be completed within few minutes. That’s it!

redsn0w 5.1 jailbreak iphone (2)redsn0w 5.1 jailbreak iphone (7)redsn0w 5.1 jailbreak iphone (1)

Once done, your iPhone 4 or iPhone 3GS will be tethered jailbroken on iOS 5.1 firmware. Now let’s talk hot to tether boot it, because without tether boot, you won’t be able to use the jailbreak features, even Safari browser.

How to Tether Boot

  1. Run the Redsn0w
  2. Hit Extras, then Just Boot.
  3. Hit next, follow the on-screen instructions to enter into DFU mode.

This should boot your iPhone 4 or iPhone 3GS into tethered jailbreak mode. Don’t forget to repeat the tether boot process every time you reboot your device.

23 comments… add one
Martín March 10, 2012, 7:27 am

Can I just uptate the firmware without having to restore the iPhone and then jailbreak it?

Ahmed AfRoO March 12, 2012, 1:10 pm

Hi, Yes u can, just connect ur iDevice to iTunes and click right click on ur iDevice on the left side of iTunes then click on BACKUP, once the Backup is done u can just jailbreak it,

if something wrong or ur firmware is damaged, restore ur iDevice then run iTunes click right click on ur idevice again then select “restore from Backup”

Good luck

Franco Ferreccio March 21, 2012, 7:29 pm

Hello !! thanks for everything, the only problem is having to install “Just Boot” in Extras, every time you restart the iphone … When going to change this?

Bader April 8, 2012, 2:34 pm

thank you for jailbreak but only one problem if i switch off the iphone the jailbreak not work so every time we have to do extras…!
thank you.

awis April 9, 2012, 5:09 pm

can i get the video for unlocking iphone4 ios5.1

Camorista April 12, 2012, 6:12 pm

It’s just got stuck into the fking recovery mode and wont move….!!! Any clue?

iphone4 October 8, 2012, 6:32 pm

hold your Start button for 3 second then hold the menu button for 10 sencond without releasing sart button. step 3 release only start button and wait 15 second with the menu or home button. should fix ur problem.

jid April 25, 2012, 9:58 pm

i already jail brake my iphone 3gs..but after jail brake, it stuck at pineapple pictue…and i also can’t restore my iphone because when i open i-tunes, it doesn’t show iphone restore (not detect the phone)…my iphone now juz display iphone picture (apple)..before this ok,but my iphone doesn’t have line…so somebody please help me..

Sayed May 3, 2012, 7:00 pm

It will be pleasure if anybody help me:

I have iphone 4 and jailbreak it. but when i restart the phone only shows the apple symbol. i kept it for whole day but it is not forwards.

please please please somebody suggest me what to do.

suraj July 4, 2012, 6:35 pm

Can you please tell me how can I jailbreak and unlock 4S using redsnow. Can you please tell me the steps to use??

saeed October 1, 2013, 10:21 am

pleas help me for jailbreak iphone 4 gsm 6.1.2 with redsnOw . I when jilbreaking via redsnOw write my iphone error 7 pleas help me

Markus A. Giles December 22, 2013, 11:01 pm

How can I jailbreak iPod touch under different firmware?

Leave a Comment