Apple iPod touch 4 iOS 5.1 IPSW firmware
Apple iPod touch 4
Not signed
iOS 5.1
Build 9B176 For iPod4,1, n81ap
Global · IPSW
A newer version is available for this region: iOS 6.1.6
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
750 MB
Downloads from secure-appldnld.apple.com.
File details
- Device
- Apple iPod touch 4
- OS
- iOS 5.1
- Region
- Global
- Type
- IPSW
- Released
- Size
- 750 MB
- File name
iPod4,1_5.1_9B176_Restore.ipsw- MD5
3eeb95d6b80b50d33708471d2e1b9306- SHA-1
65d7ee2d2fa505ce6fe91271f84f3fc9cbcc81a1- SHA-256
22022f4bb003deb24189063692c478d74275dcb1e1b2b7df30cbe6d01048b167
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: iPod4,1, n81ap. 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