With only about 10 days or so after Apple has released iOS 4.3.4, the Cupertino company just released another incremental update to the iOS 4, which is the iOS 4.3.5. As you all can probably recall, iOS 4.3.4 firmware update is no more than a security patch which is used to plug a security hole that's present within Mobile Safari, the same hole that the popular jailbreak tool, JailbreakMe 3.0 has used. Now iOS 4.3.5 is yet another security firmware update that's aimed to patch a security problem with certificate verification.
Needless to say, upgrading to iOS 4.3.5 holds very little incentives but if you are not jailbroken or is already on 4.3.4, then by all means please upgrade to the latest iOS firmware. Don't worry about being able to jailbreak your device because the latest version of Redsn0w works with iOS 4.3.5, although it is a tethered jailbreak. It has been tested and it works on all iOS devices except of course for the iPad 2. This bit of information was also confirmed by iPhone Dev Team frontman Musclenerd himself:
ah ok thanks for checking! So those who really do want tethered 4.3.5 can use redsn0w pointed at 4.3.4 (except iPad2)
WARNING: Those you who are currently in iOS 4.3.3 and below and is enjoying an untethered jailbroken device, then DO NOT upgrade to the iOS 4.3.5 or even 4.3.4 because you will lose your untethered jailbreak.
Steps on How to Jailbreak iOS 4.3.5 Using Redsn0w (Tethered):
- First, you will be needing two iOS firmware IPSW which are iOS 4.3.5 and iOS 4.3.4 (required by Redsn0w). IPSW download links are provided at the end of the guide. Make sure that your device is properly plugged into your PC or Mac.
- Restore your device to the firmware that you are wishing to jailbreak your device into through iTunes, in this case, the iOS 4.3.5. Make sure that you are running the latest iTunes version (iTunes 10.4).
- After restoring, download the latest version of Redsn0w (0.9.8b4) for Windows and Mac, if you haven't already. Download links are provided below the guide as well.
- Now launch Redsn0w and you will be asked to browse for an IPSW file. Browse for the iOS 4.3.4 IPSW (not 4.3.5). Once the IPSW is successfully identified by Redsn0w, click on Next.
- On the next screen, you will be presented with the screen that enables you choose which jailbreak components would you like to install. For now, let's check only the "Install Cydia" option. Click Next.
- On the next screen, the program will instruct you to TURN OFF your device and PLUG it into your computer. When you are ready, click Next.
- Now Redsn0w will ask you to put your device into DFU Mode, just follow the simple onscreen instructions or you can refer to the short guide below:
- Hold the Power button for about 5 seconds.
- Now Press down the Home Button without releasing the Power button. Keep both button pressed for about 10 more seconds.
- Now release the Power button but not the Home button. Keep the Home button pressed for 15 more seconds or so. Your device should be in DFU Mode afterwards.
NOTE: Again, keep in mind that this is a tethered jailbreak, which means when your device loses power or be turned off for any reasons, you will be stuck in the Apple logo boot up screen. To kick your device out of that infinite loop screen just plug in your device and perform the steps above up to step 4. Now in step 5 instead of selecting the "Install Cydia" option, check the “Just boot tethered right now”. You will need to do this for every time your device powers off or reboots.
Download iOS 4.3.5 IPSW for iPhone 4, 3GS, iPod touch and iPad
Download iOS 4.3.4 IPSW for iPhone 4, 3GS, iPod touch and iPad
Download Redsn0w 0.9.8b4 for Windows
Download Redsn0w 0.9.8b4 for Mac
Download iTunes 10.4 for Mac and Windows