IPSW · iOS
iOS 17.3.1 IPSW Download (21D61)
Build 21D61, released February 8, 2024 — restore images for 25 iPhones, straight from Apple's servers.
Choose your iPhone
25 devices. Each row is one file on Apple's CDN.
Unsigned
iPhone15,4 7.95 GB
FilenameiPhone15,4_17.3.1_21D61_Restore.ipsw
SHA-2566220c321a50777ac071e0bf1fef138017c5ab24d24973178e32d823756ede3f5
Direct URLhttps://updates.cdn-apple.com/2024WinterFCS/fullrestores/052-41142/8E292C0F-B0AF-44A1-84C4-920F738364C1/iPhone15,4_17.3.1_21D61_Restore.ipsw
Size7,947,646,245 bytes (7.95 GB)
Unsigned
iPhone15,5 7.95 GB
FilenameiPhone15,5_17.3.1_21D61_Restore.ipsw
SHA-2560866395a460d94d0d24d32c2336b2dde92780c535d1910d8accb2b16a8db85b1
Direct URLhttps://updates.cdn-apple.com/2024WinterFCS/fullrestores/052-41637/EC1890FC-0422-4D7D-98FC-DD9E361BF5F1/iPhone15,5_17.3.1_21D61_Restore.ipsw
Size7,946,784,996 bytes (7.95 GB)
Unsigned
iPhone16,1 8.13 GB
FilenameiPhone16,1_17.3.1_21D61_Restore.ipsw
SHA-2565b4020427f1999e2712966af550bb140e6f1a6368d3ef3d4b165f52d35904231
Direct URLhttps://updates.cdn-apple.com/2024WinterFCS/fullrestores/052-41588/CF83A4E3-1B73-41EA-96D0-4D84A5930AA9/iPhone16,1_17.3.1_21D61_Restore.ipsw
Size8,132,024,712 bytes (8.13 GB)
Unsigned
iPhone16,2 8.13 GB
FilenameiPhone16,2_17.3.1_21D61_Restore.ipsw
SHA-256696bb586dfe81b91b8690062826c8e8b2626074de1fb182e6e883550a2eb9fea
Direct URLhttps://updates.cdn-apple.com/2024WinterFCS/fullrestores/052-41172/862B5126-5F46-49BB-9437-28B5BEE781D5/iPhone16,2_17.3.1_21D61_Restore.ipsw
Size8,134,184,261 bytes (8.13 GB)
Unsigned
iPhone14,8 7.76 GB
FilenameiPhone14,8_17.3.1_21D61_Restore.ipsw
SHA-256890966a44779e1badcba39ea402f3889a185131ef7883a198c9ac4df077f9a5f
Direct URLhttps://updates.cdn-apple.com/2024WinterFCS/fullrestores/052-41055/3A2BF5B4-B038-4BA3-85D9-2B9D3E49D3E6/iPhone14,8_17.3.1_21D61_Restore.ipsw
Size7,762,593,516 bytes (7.76 GB)
Unsigned
iPhone14,7 7.76 GB
FilenameiPhone14,7_17.3.1_21D61_Restore.ipsw
SHA-25657f18dd9bfb61504259c95e27be5bf9f0f85787146882b8ed5c353121bda120c
Direct URLhttps://updates.cdn-apple.com/2024WinterFCS/fullrestores/052-41619/0206FCEB-1E43-4CB7-9577-B471A9FBA95B/iPhone14,7_17.3.1_21D61_Restore.ipsw
Size7,763,466,974 bytes (7.76 GB)
Unsigned
iPhone15,2 7.92 GB
FilenameiPhone15,2_17.3.1_21D61_Restore.ipsw
SHA-256b83dd5a3d77f0b411838090083d55e39a493084322901d1e82604870b3b493c8
Direct URLhttps://updates.cdn-apple.com/2024WinterFCS/fullrestores/052-41828/5878F171-FDD4-4CDF-93B1-FECBA2FEFED2/iPhone15,2_17.3.1_21D61_Restore.ipsw
Size7,924,461,198 bytes (7.92 GB)
Unsigned
iPhone15,3 7.90 GB
FilenameiPhone15,3_17.3.1_21D61_Restore.ipsw
SHA-256742426d22e658c3eef0ddd0f2a0cd95faea1a0f21193b773f8f79e4211546ccd
Direct URLhttps://updates.cdn-apple.com/2024WinterFCS/fullrestores/052-41429/0FEB2073-4010-4549-8161-9E84A8C8B3E1/iPhone15,3_17.3.1_21D61_Restore.ipsw
Size7,903,673,744 bytes (7.90 GB)
Unsigned
iPhone14,6 7.50 GB
FilenameiPhone14,6_17.3.1_21D61_Restore.ipsw
SHA-2567dfe4d93825ffb4bed9e88ee9d10f4da7754c531968ce7fdab71756a3af1a7e6
Direct URLhttps://updates.cdn-apple.com/2024WinterFCS/fullrestores/052-41609/4DFB6FD6-ECD5-4736-85BA-F995C1F338CF/iPhone14,6_17.3.1_21D61_Restore.ipsw
Size7,499,450,501 bytes (7.50 GB)
Unsigned
iPhone14,5 7.72 GB
FilenameiPhone14,5_17.3.1_21D61_Restore.ipsw
SHA-256397191c4be60f7e8a6857f09818361b368c8db4f30bc75572562f08f107b27ba
Direct URLhttps://updates.cdn-apple.com/2024WinterFCS/fullrestores/052-41195/CD81E110-A937-4300-B06D-D762E23D2D84/iPhone14,5_17.3.1_21D61_Restore.ipsw
Size7,715,057,079 bytes (7.72 GB)
Unsigned
iPhone14,4 7.74 GB
FilenameiPhone14,4_17.3.1_21D61_Restore.ipsw
SHA-256e51a9d0fea0b3426a1f315279fd599c31d0059e34a127e1ff317d606695e1213
Direct URLhttps://updates.cdn-apple.com/2024WinterFCS/fullrestores/052-42099/67F37EAA-C620-444D-9DC0-D5DCC4F9B58A/iPhone14,4_17.3.1_21D61_Restore.ipsw
Size7,738,709,875 bytes (7.74 GB)
Unsigned
iPhone14,2 7.84 GB
FilenameiPhone14,2_17.3.1_21D61_Restore.ipsw
SHA-256f490876e668db59759665b3718e70514a51b5a1bd7fe47b5adbf0cee5b527ca7
Direct URLhttps://updates.cdn-apple.com/2024WinterFCS/fullrestores/052-40512/44E293EF-D250-41FF-9F75-097D2D94DA6C/iPhone14,2_17.3.1_21D61_Restore.ipsw
Size7,836,709,929 bytes (7.84 GB)
Unsigned
iPhone14,3 7.84 GB
FilenameiPhone14,3_17.3.1_21D61_Restore.ipsw
SHA-25656760b0f24d8e238025bed7205773a6c9e90ec75d101fb37b28cf7e57ac43a50
Direct URLhttps://updates.cdn-apple.com/2024WinterFCS/fullrestores/052-41876/E98307D5-E168-4CEB-944A-B8F955D59995/iPhone14,3_17.3.1_21D61_Restore.ipsw
Size7,837,301,873 bytes (7.84 GB)
Unsigned
iPhone13,1 7.65 GB
FilenameiPhone13,1_17.3.1_21D61_Restore.ipsw
SHA-2567b595779bb03b2c1c590601a81230c211b68038a4bf870f020b34a36668ecb80
Direct URLhttps://updates.cdn-apple.com/2024WinterFCS/fullrestores/052-41682/1854FD88-74A8-4B96-AC67-81658B38DB84/iPhone13,1_17.3.1_21D61_Restore.ipsw
Size7,651,148,832 bytes (7.65 GB)
Unsigned
iPhone13,4 7.78 GB
FilenameiPhone13,4_17.3.1_21D61_Restore.ipsw
SHA-25694132880bd22bd38e09042b797329a5f13b3f6dddf8a94c88eb81300723f7a65
Direct URLhttps://updates.cdn-apple.com/2024WinterFCS/fullrestores/052-41134/9CF2BA0E-33FB-490E-A468-90B2FBFF265C/iPhone13,4_17.3.1_21D61_Restore.ipsw
Size7,784,439,035 bytes (7.78 GB)
Unsigned
iPhone13,2 7.83 GB
FilenameiPhone13,2,iPhone13,3_17.3.1_21D61_Restore.ipsw
SHA-256be6d3de69a1dc43c83b8de6d98e46a0bd62ced799d5582f42a446991de2cbbb5
Direct URLhttps://updates.cdn-apple.com/2024WinterFCS/fullrestores/052-41826/F010C641-3855-4C79-B388-D071C16353D3/iPhone13,2,iPhone13,3_17.3.1_21D61_Restore.ipsw
Size7,827,446,023 bytes (7.83 GB)
Unsigned
iPhone13,3 7.83 GB
FilenameiPhone13,2,iPhone13,3_17.3.1_21D61_Restore.ipsw
SHA-256be6d3de69a1dc43c83b8de6d98e46a0bd62ced799d5582f42a446991de2cbbb5
Direct URLhttps://updates.cdn-apple.com/2024WinterFCS/fullrestores/052-41826/F010C641-3855-4C79-B388-D071C16353D3/iPhone13,2,iPhone13,3_17.3.1_21D61_Restore.ipsw
Size7,827,446,023 bytes (7.83 GB)
Unsigned
iPhone12,8 7.29 GB
FilenameiPhone12,8_17.3.1_21D61_Restore.ipsw
SHA-256ac8a76f501070e1ee1d6bbac33f079b915be8575247df91320495c955e35dd3c
Direct URLhttps://updates.cdn-apple.com/2024WinterFCS/fullrestores/052-41460/C11397E6-0CB3-4FC5-88C4-4B792295F409/iPhone12,8_17.3.1_21D61_Restore.ipsw
Size7,290,049,708 bytes (7.29 GB)
Unsigned
iPhone12,1 7.32 GB
FilenameiPhone12,1_17.3.1_21D61_Restore.ipsw
SHA-25617ae5fc4d50912fd10970410819ee535504c7744d29426206c5073c192e47a5b
Direct URLhttps://updates.cdn-apple.com/2024WinterFCS/fullrestores/052-41854/862F1E42-EDB9-4B9F-B51D-268452D28439/iPhone12,1_17.3.1_21D61_Restore.ipsw
Size7,315,906,335 bytes (7.32 GB)
Unsigned
iPhone12,3 7.46 GB
FilenameiPhone12,3,iPhone12,5_17.3.1_21D61_Restore.ipsw
SHA-2562f6cbf0f58a4f226d396b3779ec4a0c75e679d0f05c693ef90dc6b9b49f0a3d3
Direct URLhttps://updates.cdn-apple.com/2024WinterFCS/fullrestores/052-40487/90F10DD9-C40C-4CC5-A751-0D096977F13A/iPhone12,3,iPhone12,5_17.3.1_21D61_Restore.ipsw
Size7,462,970,744 bytes (7.46 GB)
Unsigned
iPhone12,5 7.46 GB
FilenameiPhone12,3,iPhone12,5_17.3.1_21D61_Restore.ipsw
SHA-2562f6cbf0f58a4f226d396b3779ec4a0c75e679d0f05c693ef90dc6b9b49f0a3d3
Direct URLhttps://updates.cdn-apple.com/2024WinterFCS/fullrestores/052-40487/90F10DD9-C40C-4CC5-A751-0D096977F13A/iPhone12,3,iPhone12,5_17.3.1_21D61_Restore.ipsw
Size7,462,970,744 bytes (7.46 GB)
Unsigned
iPhone11,8 7.44 GB
FilenameiPhone11,8_17.3.1_21D61_Restore.ipsw
SHA-2569cb65a2db1d72f2d440d1d4f67607c51ad1481cfb44d1c7dec27580024026d95
Direct URLhttps://updates.cdn-apple.com/2024WinterFCS/fullrestores/052-42078/91F5C70B-4819-4FAA-95E3-A85075093EF8/iPhone11,8_17.3.1_21D61_Restore.ipsw
Size7,438,034,977 bytes (7.44 GB)
Unsigned
iPhone11,2 7.62 GB
FilenameiPhone11,2,iPhone11,4,iPhone11,6_17.3.1_21D61_Restore.ipsw
SHA-256969da1332aae395c7fb65c74a228ea204cca31516d0e0adf31178612d7c07828
Direct URLhttps://updates.cdn-apple.com/2024WinterFCS/fullrestores/052-40521/69721D5B-8255-434E-A719-4564E3563118/iPhone11,2,iPhone11,4,iPhone11,6_17.3.1_21D61_Restore.ipsw
Size7,618,903,622 bytes (7.62 GB)
Unsigned
iPhone11,6 7.62 GB
FilenameiPhone11,2,iPhone11,4,iPhone11,6_17.3.1_21D61_Restore.ipsw
SHA-256969da1332aae395c7fb65c74a228ea204cca31516d0e0adf31178612d7c07828
Direct URLhttps://updates.cdn-apple.com/2024WinterFCS/fullrestores/052-40521/69721D5B-8255-434E-A719-4564E3563118/iPhone11,2,iPhone11,4,iPhone11,6_17.3.1_21D61_Restore.ipsw
Size7,618,903,622 bytes (7.62 GB)
Unsigned
iPhone11,4 7.62 GB
FilenameiPhone11,2,iPhone11,4,iPhone11,6_17.3.1_21D61_Restore.ipsw
SHA-256969da1332aae395c7fb65c74a228ea204cca31516d0e0adf31178612d7c07828
Direct URLhttps://updates.cdn-apple.com/2024WinterFCS/fullrestores/052-40521/69721D5B-8255-434E-A719-4564E3563118/iPhone11,2,iPhone11,4,iPhone11,6_17.3.1_21D61_Restore.ipsw
Size7,618,903,622 bytes (7.62 GB)
No device matches.
Version
iOS 17.3.1
Build
21D61Released
February 8, 2024
Channel
Public release
Previous
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iOS 17.4 beta 3
How to install iOS 17.3.1 from the IPSW
Four steps, and the one that matters most is the first.
Back up first
A restore erases the device. Make an archived backup in Finder or the Apple Devices app — an iCloud backup taken on a newer version cannot be restored onto an older one. Our backup guide covers the difference.
Get the file for your exact model
Check Settings → General → About → Model Name, then download the IPSW for that device. The download shows the file size; compare it with the SHA-256 under Details if you want to be certain the file is intact.
Restore in Finder or Apple Devices
Connect with a cable, select the device, then hold Option (Mac) or Shift (Windows) and click Restore to choose the .ipsw. Update keeps your data but only works upward; Restore erases and is how you downgrade.
Set up or restore your backup
After the restore the device starts fresh. Restore the backup you made — only if it came from the same or an older version than the one you just installed.
Questions? Answers.
Can I restore iOS 17.3.1 today?
Not at the moment — Apple has stopped signing 21D61, so a restore will be rejected at the final step. The files remain here for reference and for signed re-releases.
Which is the right file for my device?
Match the identifier in Settings → General → About (or under the model's name here) against the one on each row. Wi-Fi and Cellular iPads share a file; different generations never do. Restoring the wrong device's IPSW simply fails — it cannot damage the device.
What does "signed" mean?
Apple's servers must approve a firmware before a device will accept it, and Apple only approves the builds it is currently shipping. A signed file can be restored today; an unsigned one is rejected at the end of the process, however you obtained it. Signing status changes without notice, usually within days of a newer release, which is why this catalogue rechecks it automatically.
Will I lose my data?
A Restore erases the device — that is what makes a downgrade possible. An Update with an IPSW keeps your data, but only when moving to a newer version. Either way, make an archived backup on a computer first; an iCloud backup taken on a newer version will not restore onto an older one.