Apple iPad Air 4 (Cellular) iPadOS 17.5 IPSW firmware
Apple iPad Air 4 (Cellular)
Not signed
iPadOS 17.5
Build 21F79 For iPad13,2, J308AP
Global · IPSW
A newer version is available for this region: iPadOS 27.2 beta 4
Apple no longer signs this version, so a normal restore with Finder or iTunes will fail. Use a signed version unless you know you need this one.
Download
7.01 GB
Downloads from updates.cdn-apple.com.
File details
- OS
- iPadOS 17.5
- Region
- Global
- Type
- IPSW
- Released
- Size
- 7.01 GB
- File name
iPad_Fall_2020_17.5_21F79_Restore.ipsw- MD5
3a96daf5a89e7f0a080ac9c7f72e847d- SHA-1
ddb2353c5ba4294d593684f5dd673bb1ec51a4b8- SHA-256
eb2e8419f0a60f684048578e574db8491753d777ee0819e22157cb1e8b16bc0b
After downloading, compare the checksum with the one above. If they differ, the file is incomplete — download it again.
Before you download
- Make sure your device’s model number is one of: iPad13,2, J308AP. You will find it in Settings → About phone, or on the box.
- This file is for the Global region. Installing another region’s firmware can remove features or block updates.
- Apple devices can only restore versions marked “Signed”.
- Back up your photos, contacts and files first, and charge the battery above 50%.
How to install
Use Finder on a Mac or the Apple Devices app / iTunes on Windows to install an IPSW file. Apple only accepts versions it is still signing, so check the “Signed” label before you download.
Read the guide: How to restore an iPhone, iPad or iPod with an IPSW file