How do I install iOS 15.8.3 RC on my iPhone 6s Plus?

Connect your device to your computer. Open iTunes (Windows / macOS Mojave and earlier) or Finder (macOS Catalina and later). Hold Option (Mac) or Shift (Windows) and click Check for Update or Restore. Select the downloaded IPSW file and follow the on-screen instructions.

What are SHSH blobs and how do I save them?

SHSH blobs are cryptographic tickets Apple uses to verify firmware installations. Saving them while a version is still signed lets you potentially restore to it later. Use TSS Saver (tsssaver.1conan.com) or the blobsaver app with your device ECID.

Home / iPhone / iPhone 6s Plus / iOS 15.8.3 RC (19H386)

iOS 15.8.3 RC

Build 19H386

No Longer Signed

iPhone 6s Plus iPhone8,2

Released

July 23, 2024

File Size

5.44 GB

Filename

iPhone_5.5_15.8.3_19H386_Restore.ipsw

Download IPSW

Important Notice About Signing Status

Signing status was last updated less than a minute ago. Apple can stop signing at any time without notice.

Verify current status at IPSW.dev

Beta Firmware Notice

For official public releases, visit IPSWDL.com

Firmware Details

Device	iPhone 6s Plus (iPhone8,2)
OS Type	iOS
Version	15.8.3 RC
Build ID	19H386
Release Date	July 23, 2024
Signing Status	Unsigned Status last checked March 12, 2026. Verify at IPSW.dev
Filename	iPhone_5.5_15.8.3_19H386_Restore.ipsw
File Size	5.44 GB
Download URL	https://updates.cdn-apple.com/2024WinterFCS/fullrestores/062-25178/530FCCC8-8385-4745-928A-B0BD0200EC3E/iPhone_5.5_15.8.3_19H386_Restore.ipsw

Installation Instructions

How to install this firmware

Download the IPSW file.
Connect your device to your computer.
Open iTunes (Windows / macOS Mojave and earlier) or Finder (macOS Catalina and later).
Hold Option (⌥) on Mac or Shift on Windows and click Check for Update or Restore.
Select the downloaded IPSW file and follow on-screen instructions.

This version is not currently signed by Apple. Installation will fail unless you have saved SHSH blobs and are using futurerestore.

Other Versions for this Device

View All

Back to Device View on Official Site Back Home