iOS 10.3.3 is Still OTA Signed for Some A7 iDevices

In addition to being signed for all A6 and A6X devices, iOS 10.3.3 is still OTA signed for the following A7 devices:

• iPhone 5S: iPhone6,1 and iPhone6,2
• iPad Air: iPad4,1, iPad4,2 and iPad4,3
• iPad mini 2: iPad4,4 and iPad4,5

These originally ran iOS 7.0.x. 10.3.3 is not OTA signed for those that started on 7.1 or higher, which are the following:

• iPad mini 2: iPad4,6
• iPad mini 3: iPad4,7, iPad4,8 and iPad4,9

It might be that users of these devices can restore to 10.2 using a nonce setter and saved blobs whenever they want, given that 10.3.3 continues to be OTA signed (8.4.1 and 6.1.3 did). According to a reddit user, he doesn’t own any 64-bit devices, but on 32-bit, we can restore to firmware with blobs and use any baseband that is still OTA signed.

To save 10.3.3 OTA blobs with tsschecker the reddit user used the following command (replace the --ecid and -d parameters with whatever you have):

./tsschecker_macos --save-path . --ecid 0x1 -s -o -i 9.9.10.3.3 --buildid 14G60 -d iPhone6,2

We don’t know if this will last, but if it does, the number of models for which 10.3.3 is signed would grow to 14 (15 if we include the 6S), and the market for a 10.3.3 jailbreak and a 64-bit kloader would be much larger.

#Update
Only 10.3.3 OTA is still signed. Use tsschecker to grab 10.3.3 OTA blobs for A7 iDevice.

So people who have A7 iDevice, and still on iOS 7.x - 9.x (maybe), he can upgrade to 10.3.3 via OTA (setting -> general -> Software Update). If your A7 iDevice is alreday on iOS 11.x, you can't downgrade to 10.3.3 via OTA, except someone can make tools.

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