Apple Firmware Database

iOS 4.3.43 Firmware

Complete firmware list for iOS 4.3.43. Check signing status per device, release dates, and download IPSW files.

4.3.43 iOS Version
Live Signing Status
All iPhone & iPad
— Compatible Devices
Firmware Browser

Browse firmware by
iOS version.

ios_firmware_browser — live apple signing database

Enter any iOS version to see all compatible devices, signing status, and download links. Data is fetched live from Apple's TSS servers.

Try: 18.0.1  ·  17.5.1  ·  16.7.10  ·  15.8.3

Querying firmware database…

Could not fetch firmware data. The version may not exist.

Device Identifier Build Status Released Size Actions
Enter an iOS version above to see firmware list
FAQ

Frequently asked questions.

Everything you need to know about iOS firmware versions and signing status.

Apple signs firmware on a per-device basis, not per-version globally. A version may remain signed for newer devices while being unsigned for older ones, especially after a device reaches end-of-life or if a security patch only applies to certain chips.
The table above shows the build ID for each device. You can also look up build IDs on ipsw.me or check your device's "About" screen (Settings → General → About → tap the version number to reveal the build).
Not through normal means. Apple's TSS server must cryptographically sign the restore. However, if you saved SHSH2 blobs while the version was signed AND your device is compatible with a bootrom exploit (like checkm8 on A5–A11), you may restore with futurerestore.
Go to Settings → General → About. Tap the "Model Number" field to toggle between the marketing number and the hardware model identifier (e.g., iPhone17,2). You can also find it in iTunes/Finder under device information.