Remember: If you are jailbroke and want to keep your jailbreak… hold off on updating to iOS 4.3. We will let you know when there is a new jailbreak out. The Dev-Team says that the wait shouldn’t be too long because @i0n1c has a 4.3 untether ready. We’ll keep our eye out.

iOS 4.3 Software Update:

This update contains new features and improvements, including the following:

    • Personal Hotspot*
         – Share iPhone 4 cellular data connection with up to 5
devices (combination of up to 3 Wi-Fi, 3 Bluetooth,
and 1 USB)

    • iTunes Home Sharing
         – Play music, movies and TV shows from a shared iTunes
library on a Mac or PC (requires iTunes 10.2)

    • New AirPlay features**
        - Play videos from the Photos app including the Camera
Roll album, iTunes previews, enabled third-party apps
and websites on Apple TV
         – Play slideshows from Photos on Apple TV using
transitions available on Apple TV

    • Faster Safari performance with Apple Nitro JavaScript
engine

    • HD video out using the Apple Digital AV Adapter***
         – View 720p HD videos from Videos app, iPod app,
Photos, YouTube, Safari, Keynote, and enabled
third-party apps on an HDMI display

    • Ping features
         – Push notifications for comments and follow requests
         – Post and Like songs directly from the Now Playing

As of the writing of this article, Cydia isn’t ready for 4.2 and I’m also not sure that this will work on the iPad for sure. Please correct me on this. The dev team blog says to point redsn0w at firmware 4.1. The iPhone runs 4.1 but not the iPad. You may be able to point it a previous iPad firmware but I haven’t tested this yet. I’m honestly waiting to jailbreak myself once Cydia is ready. We will update this article once we can confirm. I recommend syncing your device before starting this.

Instructions on updating to 4.2

1. Download the newest version of iTunes, 10.1 (links here)

2. Install the new iTunes.

3. Download the correct firmware for your device. (http://gumballtech.com/2010/11/01/ios-4-2-gm-released-for-all-devices-download-here/)

4. In iTunes, select your device and hold the Shift(windows) or Option(Mac) key while clicking the update button. This will open a window to choose your own firmware. Select the one you Just downloaded.

5. Now just wait until the update is complete. You will then have firmware 4.2!

Instructions on Jailbreaking 4.2

1. Download redsn0w from here: http://blog.iphone-dev.org/post/1452044444/redsn0w-limera1n-fun

2. Your device will be on 4.2 but when you run redsn0w you will select firmware 4.1 on your computer. You can download firmware 4.1 for your iPhone here. Just follow the instuctions with redsn0w and you’ll be jailbroken. Remember, Cydia is not yet working on 4.2.

iOS 4.1 Change Log:
• Game Center
     – Send and receive friend requests
     – Invite friends to multi-player games over the Internet
     – Play multi-player games by auto-matching with other players
     – View LEaderboards and Achievements
     – Discover new games from friends
• High dynamic range (HDR) photos on iPhone 4
• Support for TV show rentals on iTunes
• Ability to upload HD videos to YouTube and MobileMe over Wi-Fi on iPhone 4
• Additional support for AVRCP-supported accessories, including next & previous track control
• FaceTime calling directly from Favorites
• Bug fixes, including:
     – iPhone 4 proximity sensor performance
     – iPhone 3G performance
     – Nike+ iPod fixes
     – Bluetooth improvements

Products compatible with this software update:
• iPhone 4
• iPhone 3GS
• iPhone 3G
• iPod touch 2G

Notes:
- Game Center requires iPhone 4, iPhone 3GS, iPod touch 2G or later
- You will need to have iTunes 10 in-order to upgrade to iOS 4.1

Jailbreak/Unlock Info:
This upgrade will break your jailbreak/unlock. If you need to keep your jailbreak/unlock… do not upgrade to iOS 4.1! We will keep you up-to-date on the jailbreak info.

As you can see in the video, the problem has not been solved by a software update. Also, the new antenna bars are ugly…

Apple claims the update “Improves the formula to determine how many bars of signal strength to display” and is compatible with iPhone 3G, iPhone 3GS and iPhone 4.

The download is 579.3 MB for iOS 4.0.1 for iPhone 4.

“There is also, I hinted to this a couple times, an unreleased exploit in every iPhone, iPad, and iPod touch in the bootrom to get code execution. And you know if I ever do another jailbreak, that’s the exploit I have. If you’ve seen I posted like a picture of 4.0 jailbroken. I posted my iPad jailbroken. All before Spirit was released. And I used like a completely different set of exploits which maybe when iPhone 4 comes out will be out.”

Video

That’s good news for for everyone! Can’t wait for 4.0 jailbroken on my iPad and iPhone 4!

This update is for the iPhone 3G, iPhone 3GS & newer iPod touches (not 1st Gen). Some older devices will not get all updates such as backgrounding. See details below.

Here’s a list of apps that support running in the background.

This update contains over 100 new features, including the following:

• Multitasking support for third-party apps*
– Multitasking user interface to quickly move between
apps
– Support for audio apps to play in the background
– VoIP apps can receive and maintain calls in the
background or when device is asleep
– Apps can monitor location and take action while
running in the background
– Alerts and messages can be pushed to apps using
push and local notifications
– Apps can complete tasks in the background
• Folders to better organize and access apps
• Home screen Wallpaper*
• Mail improvements
– Unified inbox to view emails from all accounts in one
place
– Fast inbox switching to quickly switch between
different email accounts
– Threaded messages to view multiple emails from the
same conversation
– Attachments can be opened with compatible third-
party apps
– Search results can now be filed or deleted
– Option to select size of photo attachments
– Messages in the Outbox can be edited or deleted
• Support for iBooks and iBookstore (available from the
App Store)
• Photo and Camera improvements
– 5x digital zoom when taking a photo**
– Tap to focus during video recording**
– Ability to sync Faces from iPhoto
– Geo-tagged photos appear on a map in Photos
• Ability to create and edit playlists on device
• Calendar invitations can be sent and accepted wirelessly
with supported CalDAV servers
• Support for MobileMe calendar sharing
• Suggestions and recent searches appear during a web
search
• Searchable SMS/MMS messages**
• Spotlight search can be continued on web and Wikipedia
• Enhanced location privacy
– New Location Services icon in the status bar
– Indication of which apps have requested your location
in the last 24 hours
– Location Services can be toggled on or off for
individual apps
• Automatic spellcheck
• Support for Bluetooth keyboards*
• iPod out to navigate music, podcasts and audiobooks
through an iPod interface with compatible cars
• Support for iTunes gifting of apps
• Wireless notes syncing with IMAP-based mail accounts
• Persistent WiFi connection to receive push notifications*
• New setting for turning on/off cellular data only**
• Option to display the character count while composing
new SMS/MMS**
• Visual Voicemail messages can be kept locally even if
they have been deleted from the server**
• Control to lock portrait orientation*
• Audio playback controls for iPod and third-party audio
apps*
• New languages, dictionaries and keyboards
• Accessibility enhancements*
• Bluetooth improvements
• Better data protection using the device passcode as an
encryption key* (Requires full restore.)
• Support for third-party Mobile Device Management
solutions
• Enables wireless distribution of enterprise applications
• Exchange Server 2010 compatibility
• Support for multiple Exchange ActiveSync accounts
• Support for Juniper Junos Pulse and Cisco AnyConnect
SSL VPN apps (available from the App Store)
• More than 1,500 new developer APIs
• Bug fixes

Products compatible with this software update:
• iPhone 3G
• iPhone 3GS
• iPhone 4
• iPod touch 2nd generation
• iPod touch 3rd generation (late 2009 models with 32GB
or 64GB)

* Requires iPhone 3GS, iPhone 4, and iPod touch 3rd generation.
** Requires iPhone 3G, iPhone 3GS, and iPhone 4. SMS/MMS messaging and Visual Voicemail require support from your wireless carrier.

For feature descriptions and complete instructions, see the user guides for iPhone and iPod touch at:
http://support.apple.com/manuals/iphone
http://support.apple.com/manuals/ipodtouch

For more information about iPhone and iPod touch, go to:
http://www.apple.com/iphone
http://www.apple.com/ipodtouch

To troubleshoot your iPhone or iPod touch, or to view additional support information go to:
http://www.apple.com/support/iphone
http://www.apple.com/support/ipodtouch

For information on the security content of this update, please visit this website:
http://support.apple.com/kb/HT1222

Name Change

The firmware will no longer be called OS 4.0, it has been renames to iOS 4.

When

iOS 4 is available today to developers and will be available to the public on June 21st.

Who

iOS 4 will be available for the iPhone 4, the iPhone 3GS, the iPhone 3G (though not all the feature will work on the 3G), the iPod touch (though, once again, not all the features will be work on it). It will not be available for the first gen iPhone or the first gen iPod touch.

How Much

The upgrade is free for everyone! YAY for iPod touch users!

What is it?

This is a beta release of redsn0w targeted at developers of jailbroken apps. It uses the same pwnage2 DFU-mode exploit that we’ve been using since the 2.x days. Nothing new is revealed to Apple, and it’s not applicable to the iPad. Don’t go near it if you use yellowsn0w, ultrasn0w, or blacksn0w.

Please not that this beta is not meant for the average end-user. There are many things “broken” with jailbroken apps in the 4.0beta1 environment right now (that’s the real reason we showed “Veency” in the 4.0 jailbreak demo video last week, instead of say MobileTerminal.app, which is broken!). This beta redsn0w allows the developers behind those jailbroken apps (like MobileTerminal.app!) to fix their software before the general public gets iphoneOS 4.0.

Because it’s meant for JB app developers, this beta redsn0w does not perform hactivation. You’ll need a properly-registered developer UDID with Apple to get past the activation screen. For similar reasons, there is no Windows version of this beta redsn0w (since apps are developed on MacOSX). Please don’t pirate Apple software.

Anyone other than developers of jailbroken apps porting their software to 4.0beta1 should still be using our previously-released redsn0ws for 3.0 through 3.1.3

What devices, platforms, and FW versions are supported?

This BETA release supports:

- iPhone 3G only (for now)
- Mac OSX only (for now)
- the 4.0beta1 FW only (for now)

YOU SHOULD STAY CLEAR OF THIS BETA SOFTWARE IF YOU RELY ON A CARRIER UNLOCK. That’s because the beta redsn0w works only if your device has already been upgraded to the stock 4.0beta1 IPSW from Apple, which contains a baseband update. If you installed that IPSW, you’ve already lost the carrier unlock until the next planned release of ultrasn0w and blacksn0w.

For more information on how to use the jailbreak and for the download link… hit up the Dev-Team’s wikee page. Remember, this jailbreak is targeted at developers and not your “normal” jailbreaker!