Apple iPhone 6s iOS 13.4 firmware
Apple iPhone 6s
Not signed
iOS 13.4
Build 17E255 For iPhone8,1, N71AP, N71mAP
Global · IPSW
A newer version is available for this region: iOS 15.8.8
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
3.50 GB
Downloads from updates.cdn-apple.com.
File details
- Device
- Apple iPhone 6s
- OS
- iOS 13.4
- Region
- Global
- Type
- IPSW
- Released
- Size
- 3.50 GB
- File name
iPhone_4.7_13.4_17E255_Restore.ipsw- MD5
29b881ed8758607b4097f1f1c848d50c- SHA-1
a5b3d4f87c7a16bb1efdc24ac2d7381e367633a7- SHA-256
ab23de9c2ecf3c46ed407189f3f6280ebf14ade9390bf11a5d7594fe39306926
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: iPhone8,1, N71AP, N71mAP. 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