Apple iPad 1 iOS 4.2.1 firmware
Apple iPad 1
Not signed
iOS 4.2.1
Build 8C148 For iPad1,1, k48ap
Global · IPSW
A newer version is available for this region: iOS 5.1.1
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
551 MB
Downloads from secure-appldnld.apple.com.
File details
- Device
- Apple iPad 1
- OS
- iOS 4.2.1
- Region
- Global
- Type
- IPSW
- Released
- Size
- 551 MB
- File name
iPad1,1_4.2.1_8C148_Restore.ipsw- MD5
9402d5f05348fd68c87f885ff4cb4717- SHA-1
8717b3bedc925b587566442ad375aa65d857e79a- SHA-256
8417eeccd664a089a6b4a3b91cb7ec88753cc6f320a192bf38fb8c6ffe29665b
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: iPad1,1, k48ap. 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