SHSH

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As the SHSH blob article on Wikipedia summarizes it: "SHSH blob is a jargon term for a small piece of data that is part of Apple's digital signature protocol for iOS restores and updates, designed to control the iOS versions that users can install on their iOS devices (iPhones, iPads, iPod touches, and Apple TVs), generally only allowing the newest iOS version to be installable. "

Technically, the SHSH of a firmware image is a 1024-bit (0x80 bytes) RSA signature. This often also refers to backup files with the signature ("SHSH blobs"). This signature is needed to restore a specific iOS version; it is generated by Apple based on hardware keys of the device and the hash of the firmware. Apple only issues signatures for the currently-available iOS version, which disallows installing older iOS versions. But if you have saved signatures for an older iOS version, you may be able to use a replay attack to restore that version. Therefore it is recommended to save the signature for your device as long as Apple issues it.

With the tools mentioned below it is possible to backup the signature. It is not necessary that the device is jailbroken to do the backup. Usually the SHSH signature file is stored on Saurik's server. If it is stored there, then you can see in the top of Cydia (on jailbroken devices) for which version a backup exists. This moved to TSS Center which can be located on the main page and then they are shown at the top of that.

Users often misunderstand this system and think that the SHSH firmware version they back up depends on the firmware version they have installed on their device. This is the case for iFaith, but not for TinyUmbrella. iFaith dumps the SHSHs from your device's storage (whatever's installed on your device, e.g. 4.3.3), while TinyUmbrella gets SHSHs from Apple's servers (whatever firmwares Apple is currently signing).

Using SHSH

Older devices (iPhone and iPod touch) do not use SHSH signatures, so installation of any firmware on these devices is possible.

iPhone OS 1.x and 2.x do not use SHSH signatures, and can therefore be downgraded to at any time, even on devices that do use SHSH signatures, such as iPhone 3G.

Versions above iPhone OS 3.0 require the iBEC, iBSS, and LLB to be fully signed with an SHSH for the ECID of that device.

However, some devices are vulnerable to untethered bootrom exploits, such as 0x24000 Segment Overflow or alloc8. These devices can be restored to a custom IPSW in Pwned DFU Mode for any version that is available to that particular device. Notable devices vulnerable to untethered bootrom exploits are the iPhone 3GS and iPod touch (2nd generation). The limera1n Exploit is able to provide a tethered downgrade for vulnerable devices.

Since various exploits, such as the limera1n Exploit, are fixed in the bootrom since version Bootrom 838.3 and because iOS versions 5.0 and above includes a nonce in their SHSH hashes, downgrading newer devices is not as simple. Blobs must be stitched into a custom firmware, and restored to in Pwned DFU Mode.

Blobs can be saved with tools such as iFaith and TinyUmbrella. Firmwares can be stitched using iFaith, redsn0w or sn0wbreeze.

Newer methods such as Odysseus, Prometheus or iDeviceReRestore are used now because other tools have become outdated and newer versions of iTunes prevents restores to custom versions.

Timeline

As noted above, the original iPhone and iPod touch didn't use SHSH blobs. iPhone OS 1.x and 2.x didn't use SHSH blobs either.

iOS

Firmware For Device(s) From Until Status
10.3.3 iPad (4th generation), iPad Air, iPad Air 2, iPad Pro (12.9-inch), iPad Pro (9.7-inch), iPad (5th generation), iPad Pro (12.9-inch, 2nd generation), iPad Pro (10.5-inch), iPad mini 2, iPad mini 3, iPad mini 4, iPhone 5, iPhone 5c, iPhone 5s, iPhone 6, iPhone 6 Plus, iPhone 6s, iPhone 6s Plus, iPhone SE, iPhone 7, iPhone 7 Plus, iPod touch (6th generation) 19 Jul 2017 - Open
10.3.2 iPad Pro (12.9-inch, 2nd generation), iPad Pro (10.5-inch) 5 Jun 2017 - Open
iPad (4th generation), iPad Air, iPad Air 2, iPad Pro (12.9-inch), iPad Pro (9.7-inch), iPad (5th generation), iPad mini 2, iPad mini 3, iPad mini 4, iPhone 5, iPhone 5c, iPhone 5s, iPhone 6, iPhone 6 Plus, iPhone 6s, iPhone 6s Plus, iPhone SE, iPhone 7, iPhone 7 Plus, iPod touch (6th generation) 15 May 2017 - Open
10.3.1 iPad (5th generation) (iPad6,12) 3 Apr 2017 - Open
iPad (4th generation), iPad Air, iPad Air 2, iPad Pro (12.9-inch), iPad Pro (9.7-inch), iPad (5th generation) (iPad6,11), iPad mini 2, iPad mini 3, iPad mini 4, iPhone 5, iPhone 5c, iPhone 5s, iPhone 6, iPhone 6 Plus, iPhone 6s, iPhone 6s Plus, iPhone SE, iPhone 7, iPhone 7 Plus, iPod touch (6th generation) 27 Jun 2017 Closed
10.3 iPad (5th generation) (iPad6,12) 27 Mar 2017 - Open
iPad (4th generation), iPad Air, iPad Air 2, iPad Pro (12.9-inch), iPad Pro (9.7-inch), iPad (5th generation) (iPad6,11), iPad mini 2, iPad mini 3, iPad mini 4, iPhone 5, iPhone 5c, iPhone 5s, iPhone 6, iPhone 6 Plus, iPhone 6s, iPhone 6s Plus, iPhone SE, iPhone 7, iPhone 7 Plus, iPod touch (6th generation) 10 Apr 2017 Closed
10.2.1 iPad (4th generation), iPad Air, iPad Air 2, iPad Pro (12.9-inch), iPad Pro (9.7-inch), iPad mini 2, iPad mini 3, iPad mini 4, iPhone 5, iPhone 5c, iPhone 5s, iPhone 6, iPhone 6 Plus, iPhone 6s, iPhone 6s Plus, iPhone SE, iPhone 7, iPhone 7 Plus, iPod touch (6th generation) 23 Jan 2017 10 Apr 2017 Closed
10.2 12 Dec 2016 30 Jan 2017 Closed
10.1.1 (14B150) 9 Nov 2016 20 Dec 2016 Closed
10.1.1 (14B100) 31 Oct 2016 20 Dec 2016 Closed
10.1 24 Oct 2016 20 Dec 2016 Closed
10.0.3 iPhone 7, iPhone 7 Plus 17 Oct 2016 31 Oct 2016 Closed
10.0.2 iPad (4th generation), iPad Air, iPad Air 2, iPad Pro (12.9-inch), iPad Pro (9.7-inch), iPad mini 2, iPad mini 3, iPad mini 4, iPhone 5, iPhone 5c, iPhone 5s, iPhone 6, iPhone 6 Plus, iPhone 6s, iPhone 6s Plus, iPhone SE, iPhone 7, iPhone 7 Plus, iPod touch (6th generation) 23 Sep 2016 31 Oct 2016 Closed
10.0.1 13 Sep 2016 18 Oct 2016 Closed
9.3.5 iPad (4th generation), iPad Air, iPad Air 2, iPad Pro (12.9-inch), iPad Pro (9.7-inch), iPad mini 2, iPad mini 3, iPad mini 4, iPhone 5, iPhone 5c, iPhone 5s, iPhone 6, iPhone 6 Plus, iPhone 6s, iPhone 6s Plus, iPhone SE, iPod touch (6th generation) 25 Aug 2016 18 Oct 2016 Closed
iPad 2, iPad (3rd generation), iPad mini, iPhone 4S, iPod touch (5th generation) - Open
9.3.4 iPad 2, iPad (3rd generation), iPad (4th generation), iPad Air, iPad Air 2, iPad Pro (12.9-inch), iPad Pro (9.7-inch), iPad mini, iPad mini 2, iPad mini 3, iPad mini 4, iPhone 4S, iPhone 5, iPhone 5c, iPhone 5s, iPhone 6, iPhone 6 Plus, iPhone 6s, iPhone 6s Plus, iPhone SE, iPod touch (5th generation), iPod touch (6th generation) 4 Aug 2016 7 Sep 2016 Closed
9.3.3 18 Jul 2016 24 Aug 2016 Closed
9.3.2 (13F72) iPad Pro (9.7-inch) 2 Jun 2016 24 Aug 2016 Closed
9.3.2 (13F69) iPad 2, iPad (3rd generation), iPad (4th generation), iPad Air, iPad Air 2, iPad Pro (12.9-inch), iPad Pro (iPad6,4), iPad mini, iPad mini 2, iPad mini 3, iPad mini 4, iPhone 4S, iPhone 5, iPhone 5c, iPhone 5s, iPhone 6, iPhone 6 Plus, iPhone 6s, iPhone 6s Plus, iPhone SE, iPod touch (5th generation), iPod touch (6th generation) 16 May 2016 24 Aug 2016 Closed
iPad Pro (iPad6,3) 26 May 2016 Closed
9.3.1 iPad 2, iPad (3rd generation), iPad (4th generation), iPad Air, iPad Air 2, iPad Pro (12.9-inch), iPad Pro (9.7-inch), iPad mini, iPad mini 2, iPad mini 3, iPad mini 4, iPhone 4S, iPhone 5, iPhone 5c, iPhone 5s, iPhone 6, iPhone 6 Plus, iPhone 6s, iPhone 6s Plus, iPhone SE, iPod touch (5th generation), iPod touch (6th generation) 31 Mar 2016 10 Jun 2016 Closed
9.3 (13E237) iPad 2 (iPad2,1), iPad 2 (iPad2,3), iPad 2 (iPad2,4), iPad (3rd generation), iPad (4th generation), iPad Air, iPad mini, iPad mini 2, iPhone 4S, iPhone 5, iPhone 5c, iPhone 5s, iPod touch (5th generation) 28 Mar 2016 22 Apr 2016 Closed
9.3 (13E236) iPad 2 (iPad2,2) 25 Mar 2016 Closed
9.3 (13E234) iPad Pro (9.7-inch) 21 Mar 2016 18 Apr 2016 Closed
9.3 (13E233) iPad Air 2, iPad Pro (12.9-inch), iPad mini 3, iPad mini 4, iPhone 6, iPhone 6 Plus, iPhone 6s, iPhone 6s Plus, iPhone SE, iPod touch (6th generation) Closed
iPad 2, iPad (3rd generation), iPad (4th generation), iPad Air, iPad mini, iPad mini 2, iPhone 4S, iPhone 5, iPhone 5c, iPhone 5s, iPod touch (5th generation) 24 Mar 2016 Closed
9.2.1 (13D20) iPad Air 2, iPad Pro (12.9-inch), iPad mini 3, iPad mini 4, iPhone 6, iPhone 6 Plus, iPhone 6s, iPhone 6s Plus 18 Feb 2016 5 Apr 2016 Closed
9.2.1 (13D15) iPad 2, iPad (3rd generation), iPad (4th generation), iPad Air, iPad Air 2, iPad Pro (12.9-inch), iPad mini, iPad mini 2, iPad mini 3, iPad mini 4, iPhone 4S, iPhone 5, iPhone 5c, iPhone 5s, iPhone 6, iPhone 6 Plus, iPhone 6s, iPhone 6s Plus, iPod touch (5th generation), iPod touch (6th generation) 19 Jan 2016 5 Apr 2016 Closed
9.2 iPad 2 (iPad2,4), iPad (3rd generation) (iPad3,1), iPad (4th generation), iPad Air, iPad Air 2, iPad Pro (12.9-inch), iPad mini, iPad mini 2, iPad mini 3, iPad mini 4, iPhone 5, iPhone 5c, iPhone 5s, iPhone 6, iPhone 6 Plus, iPhone 6s, iPhone 6s Plus, iPod touch (5th generation), iPod touch (6th generation) 8 Dec 2015 5 Feb 2016 Closed
iPad 2 (iPad2,1), iPad 2 (iPad2,2), iPad 2 (iPad2,3), iPad (3rd generation) (iPad3,2), iPad (3rd generation) (iPad3,3), iPhone 4S 4 Feb 2016 Closed
9.1 (13B144) iPad Pro (12.9-inch) 17 Nov 2015 21 Dec 2015 Closed
9.1 (13B143) iPad 2, iPad (3rd generation), iPad (4th generation), iPad Air, iPad Air 2, iPad mini, iPad mini 2, iPad mini 3, iPad mini 4, iPhone 4S, iPhone 5, iPhone 5c, iPhone 5s, iPhone 6, iPhone 6 Plus, iPhone 6s, iPhone 6s Plus, iPod touch (5th generation), iPod touch (6th generation) 21 Oct 2015 Closed
iPad Pro 2 Dec 2015 Closed
9.0.2 iPad 2, iPad (3rd generation), iPad (4th generation), iPad Air, iPad Air 2, iPad mini, iPad mini 2, iPad mini 3, iPad mini 4, iPhone 4S, iPhone 5, iPhone 5c, iPhone 5s, iPhone 6, iPhone 6 Plus, iPod touch (5th generation), iPod touch (6th generation) 30 Sep 2015 29 Oct 2015 Closed
9.0.1 iPhone 6s, iPhone 6s Plus 24 Sep 2015 8 Oct 2015 Closed
iPad 2, iPad (3rd generation), iPad (4th generation), iPad Air, iPad Air 2, iPad mini, iPad mini 2, iPad mini 3, iPad mini 4, iPhone 4S, iPhone 5, iPhone 5c, iPhone 5s, iPhone 6, iPhone 6 Plus, iPod touch (5th generation), iPod touch (6th generation) 23 Sep 2015 Closed
9.0 iPad 2, iPad (3rd generation), iPad (4th generation), iPad Air, iPad Air 2, iPad mini, iPad mini 2, iPad mini 3, iPad mini 4, iPhone 4S, iPhone 5, iPhone 5c, iPhone 5s, iPhone 6, iPhone 6 Plus, iPhone 6s, iPhone 6s Plus, iPod touch (5th generation), iPod touch (6th generation) 16 Sep 2015 30 Sep 2015 Closed
8.4.1 iPad 2, iPad (3rd generation), iPad (4th generation), iPad Air, iPad Air 2, iPad mini, iPad mini 2, iPad mini 3, iPhone 4S, iPhone 5, iPhone 5c, iPhone 5s, iPhone 6, iPhone 6 Plus, iPod touch (5th generation), iPod touch (6th generation) 13 Aug 2015 Closed
8.4 iPod touch (6th generation) 15 Jul 2015 23 Aug 2015 Closed
iPad 2, iPad (3rd generation), iPad (4th generation), iPad Air, iPad Air 2, iPad mini, iPad mini 2, iPad mini 3, iPhone 4S, iPhone 5, iPhone 5c, iPhone 5s, iPhone 6, iPhone 6 Plus, iPod touch (5th generation) 30 Jun 2015 23 Aug 2015 Closed
8.3 8 Apr 2015 7 Jul 2015 Closed
8.2 9 Mar 2015 4 May 2015 Closed
8.1.3 27 Jan 2015 23 Mar 2015 Closed
8.1.2 9 Dec 2014 10 Feb 2015 Closed
8.1.1 17 Nov 2014 17 Dec 2014 Closed
8.1 20 Oct 2014 1 Dec 2014 Closed
8.0.2 iPad 2, iPad (3rd generation), iPad (4th generation), iPad Air, iPad mini, iPad mini 2, iPhone 4S, iPhone 5, iPhone 5c, iPhone 5s, iPhone 6, iPhone 6 Plus, iPod touch (5th generation) 25 Sep 2014 20 Oct 2014 Closed
8.0.1 24 Sep 2014 24 Sep 2014 Closed
8.0 17 Sep 2014 22 Oct 2014 Closed
7.1.2 iPhone 4 13 Feb 2017 - Open
30 Jun 2014 13 Feb 2017 Closed
iPad 2, iPad (3rd generation), iPad (4th generation), iPad Air, iPad mini, iPad mini 2, iPhone 4S, iPhone 5, iPhone 5c, iPhone 5s, iPod touch (5th generation) 26 Sep 2014 Closed
7.1.1 iPad 2, iPad (3rd generation), iPad (4th generation), iPad Air, iPad mini, iPad mini 2, iPhone 4, iPhone 4S, iPhone 5, iPhone 5c, iPhone 5s, iPod touch (5th generation) 22 Apr 2014 12 Aug 2014 Closed
7.1 10 Mar 2014 30 Apr 2014 Closed
7.0.6 21 Feb 2014 10 Mar 2014 Closed
7.0.5 iPhone 5c (iPhone5,4), iPhone 5s (iPhone6,2) 29 Jan 2014 21 Feb 2014 Closed
7.0.4 iPad 2, iPad (3rd generation), iPad (4th generation), iPad Air, iPad mini, iPad mini 2, iPhone 4, iPhone 4S, iPhone 5, iPhone 5c, iPhone 5s, iPod touch (5th generation) 14 Nov 2013 21 Feb 2014 Closed
7.0.3 22 Oct 2013 14 Nov 2013 Closed
7.0.2 iPad mini (iPad2,5) 26 Sep 2013 21 Feb 2014 Closed
iPad 2, iPad (3rd generation), iPad (4th generation), iPad mini (iPad2,6), iPad mini (iPad2,7), iPhone 4, iPhone 4S, iPhone 5, iPhone 5c, iPhone 5s, iPod touch (5th generation) 29 Oct 2013 Closed
7.0.1 iPhone 5c, iPhone 5s 18 Sep 2013 7 Oct 2013 Closed
7.0 iPad 2, iPad (3rd generation), iPad (4th generation), iPad mini, iPhone 4, iPhone 4S, iPhone 5, iPod touch (5th generation) 18 Sep 2013 7 Oct 2013 Closed
6.1.6 iPhone 3GS, iPod touch (4th generation) 13 Feb 2017 - Open
24 Nov 2013 13 Feb 2017 Closed
6.1.5 iPod touch (4th generation) 24 Sep 2013 21 Feb 2014 Closed
6.1.4 iPhone 5 2 May 2013 20 Sep 2013 Closed
6.1.3 iPhone 3GS 19 Mar 2013 21 Feb 2014 Closed
iPod touch (4th generation) 14 Nov 2013 Closed
iPhone 5 2 May 2013 Closed
iPad mini (iPad2,6) 25 Sep 2013 Closed
iPad 2, iPad (3rd generation), iPad (4th generation), iPad mini (iPad2,5), iPad mini (iPad2,7), iPhone 4, iPhone 4S, iPod touch (5th generation) 20 Sep 2013 Closed
6.1.2 iPod touch (5th generation) 19 Feb 2013 20 Mar 2013 Closed
iPad 2, iPad (3rd generation), iPad (4th generation), iPad mini iPhone 3GS, iPhone 4, iPhone 4S, iPhone 5, iPod touch (4th generation) 19 Mar 2013 Closed
6.1.1 iPhone 4S 11 Feb 2013 19 Feb 2013 Closed
6.1 iPad mini (iPad2,6), iPod touch (4th generation) 28 Jan 2013 20 Mar 2013 Closed
iPad 2, iPad (3rd generation), iPad (4th generation), iPad mini, iPhone 3GS, iPhone 4, iPhone 4S, iPhone 5, iPod touch (5th generation) 28 Jan 2013 19 Feb 2013 Closed
6.0.2 iPad mini (iPad2,5), iPhone 5 26 Jul 2013 Closed
iPad mini, iPhone 5 18 Dec 2012 28 Jan 2013 Closed
6.0.1 iPad 2, iPad (3rd generation), iPad (4th generation), iPad mini, iPhone 3GS, iPhone 4, iPhone 4S, iPhone 5, iPod touch (4th generation), iPod touch (5th generation) 1 Nov 2012 28 Jan 2013 Closed
iPad 2, iPad (3rd generation), iPad (4th generation) (iPad3,4), iPad mini (iPad2,5), iPhone 3GS, iPhone 4, iPhone 4S, iPhone 5, iPod touch (4th generation), iPod touch (5th generation) 26 Jul 2013 Closed
iPad mini 1 Nov 2012 8 Jan 2013 Closed
iPad (4th generation), iPad mini 9 Nov 2012 28 Jan 2013 Closed
6.0 iPad (4th generation) (iPad3,4), iPad mini (iPad2,5) 30 Oct 2012 1 Nov 2012 Closed
iPad 2, iPad (3rd generation), iPad mini (iPad2,5), iPhone 3GS, iPhone 4, iPhone 4S, iPhone 5, iPod touch (4th generation), iPod touch (5th generation) 26 Jul 2013 Closed
iPad 2, iPad (3rd generation), iPhone 3GS, iPhone 4, iPhone 4S, iPhone 5, iPod touch (4th generation), iPod touch (5th generation) 19 Sep 2012 1 Nov 2012 Closed
5.1.1 (9B208) iPhone 4 (iPhone3,1) 25 May 2012 21 Sep 2012 Closed
5.1.1 (9B206) iPad 13 Feb 2017 - Open
7 May 2012 13 Feb 2017 Closed
iPod touch (3rd generation) - Open
iPad 2, iPad (3rd generation), iPhone 3GS, iPhone 4, iPhone 4S, iPod touch (4th generation) 21 Sep 2012 Closed
5.1 iPad, iPad 2, iPad (3rd generation), iPhone 3GS, iPhone 4, iPhone 4S, iPod touch (3rd generation), iPod touch (4th generation) 7 Mar 2012 14 May 2012 Closed
5.0.1 iPad, iPad 2, iPhone 3GS, iPhone 4, iPhone 4S, iPod touch (3rd generation), iPod touch (4th generation) 9 Nov 2011 8 Feb 2012 Closed
5.0 iPhone 4S 14 Oct 2011 10 Nov 2011(?) Closed
iPad, iPad 2, iPhone 3GS, iPhone 4, iPod touch (3rd generation), iPod touch (4th generation) 4 Oct 2011 10 Nov 2011(?) Closed
4.3.5 iPad, iPad 2, iPhone 3GS, iPhone 4(iPhone3,1), iPod touch (3rd generation), iPod touch (4th generation) 25 July 2011 18 Oct 2011 Closed
4.3.4 15 Jul 2011 27 Jul 2011 Closed
4.3.3 4 May 2011 18 Jul 2011 Closed
4.3.2 14 Apr 2011 6 May 2011 Closed
4.3.1 25 Mar 2011 19 Apr 2011 (?) Closed
4.3 9 Mar 2011 27 Mar 2011 (?) Closed
4.2.10 iPhone 4 (iPhone3,3) 25 Jul 2011 18 Oct 2011 Closed
4.2.9 15 Jul 2011 27 Jul 2011 Closed
4.2.8 4 May 2011 18 Jul 2011 Closed
4.2.7 14 Apr 2011 6 May 2011 Closed
4.2.6 1 Feb 2011 19 Apr 2011 (?) Closed
4.2.1 iPhone 3G, iPod touch (2nd generation) 22 Nov 2010 - Open
iPad, iPhone 3GS, iPhone 4 (iPhone3,1), iPod touch (3rd generation), iPod touch (4th generation) 11 Mar 2011 Closed
4.1 (8B118) iPod touch (4th generation) 21 Sep 2010 2 Dec 2010 (?) Closed
4.1 (8B117) iPod touch (2nd generation), iPod touch (3rd generation) 8 Sep 2010 - Open
iPhone 3G, iPhone 3GS 13 Feb 2017 Open
8 Sep 2010 13 Feb 2017 Closed
iPhone 4 (iPhone3,1), iPod touch (4th generation) 2 Dec 2010 (?) Closed
4.0.2 iPhone 3GS, iPhone 4 (iPhone3,1), iPod touch (3rd generation) 11 Aug 2010 9 Sep 2010 Closed
iPhone 3G, iPod touch (2nd generation) 11 Aug 2010 18 Sep 2010 Closed
4.0.1 iPhone 3GS, iPhone 4 (iPhone3,1) 15 Jul 2010 19 Aug 2010 Closed
iPhone 3G 15 Jul 2010 9 Sep 2010 Closed
4.0 iPod touch (3rd generation) 21 Jun 2010 9 Aug 2010 Closed
iPod touch (2nd generation) 21 Jun 2010 9 Sep 2010 Closed
iPhone 3G, iPhone 3GS 21 Jun 2010 15 Jul 2010 Closed
iPhone 4 (iPhone3,1) 24 Jun 2010 15 Jul 2010 Closed
3.2.2 iPad 11 Aug 2010 2 Dec 2010 (?) Closed
3.2.1 15 Jul 2010 19 Aug 2010 Closed
3.2 3 Apr 2010 15 Jul 2010 Closed
3.1.3 iPhone 3GS, iPod touch (2nd generation), iPod touch (3rd generation) 2 Feb 2010 21 Jun 2010 Closed
3.1.2 iPhone 3GS, iPod touch (3rd generation) 8 Oct 2009 2 Feb 2010 Closed
iPod touch (2nd generation) 8 Oct 2009 21 Jun 2010 Closed
3.1.1 (7C146) iPod touch (3rd generation) 17 Sep 2009 8 Oct 2009 (?) Closed
3.1.1 (7C145) 9 Sep 2009 8 Oct 2009 Closed
iPod touch (2nd generation) 9 Sep 2009 21 Jun 2010 Closed
3.1 iPhone 3GS 9 Sep 2009 8 Oct 2009 Closed
3.0.1 31 Jul 2009 9 Sep 2009 Closed
3.0 19 Jun 2009 Closed

Apple TV

Marketing Version OS Version For Device(s) From Until Status
N/A 10.2.2 Apple TV (4th generation) 19 Jul 2017 - Open
10.2.1 15 May 2017 - Open
10.2 27 Mar 2017 27 Jun 2017 Closed
10.1.1 23 Jan 2017 10 Apr 2017 Closed
10.1 12 Dec 2016 30 Jan 2017 Closed
10.0.1 24 Oct 2016 30 Jan 2017 Closed
10.0 13 Sep 2016 31 Oct 2016 Closed
9.2.2 18 Jul 2016 18 Oct 2016 Closed
9.2.1 16 May 2016 23 Sep 2016 Closed
9.2 21 Mar 2016 10 Jun 2016 Closed
9.1.1 25 Jan 2016 5 Apr 2016 Closed
9.1 8 Dec 2015 4 Feb 2016 Closed
9.0.1 9 Nov 2015 21 Dec 2015 Closed
9.0 29 Oct 2015 14 Dec 2015 Closed
7.2.2 8.4.2 Apple TV (3rd generation) 12 Dec 2016 - Open
7.2.1 8.4.1 25 Feb 2016 20 Dec 2016 Closed
7.2 8.3 8 Apr 2015 7 Apr 2016 Closed
7.1 8.2 9 Mar 2015 4 May 2015 Closed
7.0.3 8.1.3 27 Jan 2015 23 Mar 2015 Closed
7.0.2 8.1.1 17 Nov 2014 1 Apr 2015 Closed
7.0.1 8.1 20 Oct 2014 1 Dec 2014 Closed
7.0 8.0 17 Sep 2014 22 Oct 2014 Closed
6.2.1 7.1.2 Apple TV (2nd generation) 13 Feb 2017 - Open
17 Sep 2014 13 Feb 2017 Closed
6.2 Apple TV (2nd generation), Apple TV (3rd generation) 30 Jun 2014 26 Sep 2014 Closed
6.1.1 7.1.1 22 Apr 2014 11 Jul 2014 Closed
6.1 7.1 10 Mar 2014 30 Apr 2014 Closed
6.0.2 7.0.6 21 Feb 2014 10 Mar 2014 Closed
7.0.4 14 Nov 2013 21 Feb 2014 Closed
6.0.1 7.0.3 24 Oct 2013 14 Nov 2013 Closed
6.0 7.0.2 24 Sep 2013 29 Oct 2013 Closed
7.0.1 20 Sep 2013 24 Sep 2013 Closed
5.3 6.1.4 Apple TV (3rd generation) (AppleTV3,2) 19 Jun 2013 21 Sep 2013 Closed
Apple TV (2nd generation), Apple TV (3rd generation) (AppleTV3,1) 13 Feb 2017 - Open
19 Jun 2013 13 Feb 2017 Closed
5.2.1 6.1.3 Apple TV (2nd generation), Apple TV (3rd generation) 19 Mar 2013 20 Jun 2013 Closed
5.2 6.1 28 Jan 2013 20 Mar 2013 Closed
5.1.1 6.0.1 Apple TV (2nd generation), Apple TV (3rd generation) (AppleTV3,1) 26 Nov 2012 20 Mar 2013 Closed
5.1 6.0 24 Sep 2012 20 Mar 2013 Closed
5.0.2 5.1.1 5 Jun 2012 20 Mar 2013 Closed
5.0.1 10 May 2012 Jul 2012 (day unknown) Closed
5.0 5.1 7 Mar 2012 14 May 2012 Closed
4.4.4 5.0.1 Apple TV (2nd generation) 15 Dec 2011 8 Mar 2012 Closed
4.4.3 17 Nov 2011 11 Jan 2012(?) Closed
4.4.2 5.0 24 Oct 2011 11 Jan 2012(?) Closed
4.4.1 17 Oct 2011  ? Closed
4.4 4 Oct 2011  ? Closed
4.3 9 Mar 2011  ? Closed
4.2.2 4.3 11 May 2011 18 Oct 2011 (?) Closed
4.2.1 22 Mar 2011 28 May 2011 (?) Closed
4.2 9 Mar 2011 22 Mar 2011 (?) Closed
4.1.1 4.2.1 14 Dec 2010 28 May 2011 (?) Closed
4.1 4.2 22 Nov 2010 14 Dec 2010 Closed
4.0 4.1 29 Sep 2010 2 Dec 2010 (?) Closed

Protocol

To request a SHSH blob from Apple, a simple HTTP request can be made. For a full description, see the separate articles SHSH Protocol and Baseband SHSH Protocol.

See Also

External Links