Apple iPhone 4s iOS 8.1.2 IPSW firmware
Apple iPhone 4s
Not signed
iOS 8.1.2
Build 12B440 For iPhone4,1, n94ap
Global · IPSW
A newer version is available for this region: iOS 9.3.6
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
1.45 GB
Downloads from secure-appldnld.apple.com.
File details
- Device
- Apple iPhone 4s
- OS
- iOS 8.1.2
- Region
- Global
- Type
- IPSW
- Released
- Size
- 1.45 GB
- File name
iPhone4,1_8.1.2_12B440_Restore.ipsw- MD5
39341750faab88b272fdfb7ac0316597- SHA-1
53fa0cf99b772736630555b00d6d0f92494a09d9- SHA-256
b482f5749adf59d118ad5449d10db22e261a78d6f9d9f3677550a9371cff0ced
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: iPhone4,1, n94ap. 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