If you want to downgrade your iOS device with FutureRestore, there are multiple components that need to be present and work fine before the downgrade process can succeed. At first, you would need to have your SHSH2 blobs saved prior to the iOS version getting unsigned, you need FutureRestore, and most importantly, SEP and Baseband need to be compatible from the latest version or a signed iOS version to the one you try to downgrade to.
How does SEP and Baseband compatibility work?[edit]
When you use FutureRestore to downgrade your iOS version, you combine components from two different IPSW files containing two separate iOS versions. Let’s say you wanna downgrade to iOS 14.3 from iOS 15.6. Assuming a kernel exploit exists that can enable you to set the Nonce Generator from inside the saved SHSH2 blobs, you will need to combine the version you want to downgrade to with the SEP and Baseband from the latest version (or a signed version).
The reason we need to combine them is that we need a signed SEP and Baseband from a current version, and here’s where things can get tricky because the latest signed version may not always have a SEP and a Baseband compatible with the version you try to downgrade to.
Since iOS 15.6 is the latest version, you will be able to combine iOS 14.3 (the version you want to downgrade to) with iOS 15.6. But if you wanted to downgrade to iOS 13.7, the 15.6 SEP and Baseband wouldn’t have been compatible so the restore would have failed.
- How do I downgrade with FutureRestore? Here’s a full FutureRestore iOS Downgrade guide!
- Here you can find the latest iOS Jailbreak downloads and check if there’s a jailbreak available for you.
How do I know if SEP and Baseband are compatible?[edit]
You need to research whether the SEP and Baseband of the current signed versions are compatible with the version you try to downgrade to before attempting to downgrade. Otherwise, the downgrade can fail and bootloop your device which will require you to update to the latest iOS version which may not be jailbreakable for months.
Below you can find our chart of compatible SEP and Baseband for FutureRestore downgrades!
SEP and Baseband Compatibility Chart[edit]
IMPORTANT:
- You can check out the current signed iOS versions for your device, including the Betas, on the iOS TSS Signing Status Page!
- If the list below shows you can do a downgrade, you can find the right SEP and Baseband files for your downgrade using the SEP Finder Bot. Check below first!
- iOS 16 SEP is not compatible with iOS 15/14 on any devices and will cause an activation error. If you want to downgrade a device supported by iOS 16, do it before iOS 15 is unsigned.
Last Updated: August 4, 2022
Current iOS Version: 15.6
| Chip | Devices | Status |
|---|---|---|
| A15 | iPhone SE 3rd Generation | Downgrades to iOS 15.4 – 15.5 might be possible with the latest SEP. |
| iPhone 13 / 13 Pro / 13 Pro Max / 13 mini | There’s no iOS 14 for these devices, so no downgrades. iOS 15.0 – 15.3.1 will also likely fail. Downgrading to 15.4-15.5 MIGHT be OK. | |
| A14 | iPhone 12 / 12 Pro / 12 Pro Max / 12 mini | Incompatible. Downgrades from 14.1 – 15.3.1 with iOS 15.6 SEP + BB will likely fail and bootloop the device. Downgrading to 15.4-15.5 MIGHT be OK. |
| A13 | iPhone SE 2020 | SEP & Baseband are compatible. |
| iPhone 11 / 11 Pro / 11 Pro Max | Incompatible. Downgrades from 14.1 – 15.3.1 with iOS 15.6 SEP + BB will likely fail and bootloop the device. | |
| A12 | iPhone XS / XR / XS Max | SEP & Baseband are technically compatible, but restoring to iOS 14.x – 15.3.1 with them will break FaceID. Downgrading to 15.4-15.5 is OK. |
| A11 | iPhone X | |
| iPhone 8 / 8 Plus | SEP & Baseband can be used to restore iOS 14.3 – iOS 15.5 without issues. | |
| A10 | iPhone 7 / 7 Plus | SEP & Baseband can be used to restore iOS 14.0 – iOS 15.5 without issues. |
| iPod Touch 7th Generation | ||
| A9 | iPhone 6S / 6S Plus | |
| iPhone SE |