iPhone 11 Pro Max
Unsigned iOS

iOS 15.3.1 (19D52)

iPhone 11 Pro Max

iPhone11,2,iPhone11,4,iPhone11,6,iPhone12,3,iPhone12,5_15.3.1_19D52_Restore.ipsw
Device
iPhone 11 Pro Max
Identifier
iPhone12,5
OS
iOS
Version
15.3.1
Build
19D52
Release Date
2022-02-10
Upload Date
2022-02-07
Size
7.01 GB
Status
Unsigned
SHA1
ae8469c2f4ecc6e825a5ab9368d843469524be21
SHA256
c69c2d6200198229f371dc0cf49b9aff914a49d35bbc5bb9baff2b42555e09b7
MD5
65ce30688c78608e81f50023cb64f641

iOS 15.3.1 Release Notes

iOS 15.3.1 provides important security updates for your iPhone and fixes an issue that may cause Braille displays to stop responding.

For information on the security content of Apple software updates, please visit this website:

https://support.apple.com/kb/HT201222

How to Restore iOS 15.3.1 IPSW

🖥

iTunes (Windows / macOS Mojave and older) & Finder (macOS Catalina+)

  1. Download the iPhone11,2,iPhone11,4,iPhone11,6,iPhone12,3,iPhone12,5_15.3.1_19D52_Restore.ipsw file to your computer.
  2. Connect your iPhone 11 Pro Max to your computer with a USB cable.
  3. Open Finder (macOS Catalina+) or iTunes (Windows / older macOS) and select your device.
  4. To Update (keeps data): hold Option (Mac) or Shift (Windows) and click Check for Update.
  5. To Restore (erases data): hold Option (Mac) or Shift (Windows) and click Restore iPhone/iPad.
  6. Navigate to and select the downloaded .ipsw file, then confirm.
  7. Wait for the process to complete — do not disconnect the device.
⚠️ Note: This firmware is no longer signed by Apple. iTunes/Finder may reject the restore. Use a tool like futurerestore if you have saved blobs.
⌨️

idevicerestore (Command Line)

An open-source command-line tool that restores IPSW files without needing iTunes. Useful for advanced users, automation, and custom restore workflows.

  1. Install via Homebrew: brew install idevicerestore
  2. Connect your device and put it into DFU mode.
  3. Run the restore command:
idevicerestore -t iPhone11,2,iPhone11,4,iPhone11,6,iPhone12,3,iPhone12,5_15.3.1_19D52_Restore.ipsw
Common flags:
-eErase restore (factory reset) -uUpdate restore (keep data) -dEnable debug output -nDry-run — don't actually restore
🔓

futurerestore (Saved Blobs / Downgrade)

futurerestore allows restoring to unsigned firmware like this one when you have saved APTickets (blobs) from a tool like TSSSaver or shsh.host.

  1. Download futurerestore from github.com/futurerestore/futurerestore.
  2. Ensure you have a saved .shsh2 blob for iOS 15.3.1 (19D52) on your iPhone 11 Pro Max.
  3. Put your device into DFU mode and run:
futurerestore -t your_blob.shsh2 --latest-sep --latest-baseband iPhone11,2,iPhone11,4,iPhone11,6,iPhone12,3,iPhone12,5_15.3.1_19D52_Restore.ipsw
⛔ Warning: Using --latest-sep requires the latest SEP to be compatible with iOS 15.3.1. Always verify compatibility before restoring to avoid a bricked device.
📲

Entering DFU Mode

DFU (Device Firmware Update) mode is required for most manual restores. The button combination varies by device:

iPhone 8 / X and later / iPad with Face ID
Press & release Volume Up → press & release Volume Down → hold Side button until screen goes black → hold Side + Volume Down for 5 s → release Side but keep Volume Down for 10 s.
iPhone 7 / 7 Plus
Hold Side + Volume Down for 8 s → release Side but keep Volume Down for 10 s.
iPhone 6s and earlier / iPad with Home button
Hold Home + Sleep/Wake for 8 s → release Sleep/Wake but keep Home for 10 s.

💡 Tip: In DFU mode the screen stays completely black. If you see the Apple logo or a "Connect to iTunes" screen, you entered Recovery mode instead — try again.

⇓ Download IPSW Firmware (7.01 GB)
iPhone 11 Pro Max
Other Signed iOS Versions
1 items iOS 15.3.1 (19D52)