What is Signing Status?

Apple only allows installation of firmware versions & labelled it as "signed". Once a version is unsigned, you cannot install it officially. iOS Signing Status is a real-time tracking tool built to easily check if the iOS IPSW firmware is still installable on iPhones and iPads devices.

How long are versions signed?

Apple usually keeps an iOS version signed for about 2 - 4 weeks after a newer update is released. During this time, you can still install, restore, or downgrade to that firmware using IPSW files.

How to check iOS signing status?

You can use our iOS Signing Status tool. It is a simple way to check the current iOS signing status. Here we listed all the latest current Signed IPSW. You can check and find your iPhone or iPad model to get the signed version.

Why does Apple stop signing iOS versions?

Apple stops signing older iOS versions to prevent downgrades to old or vulnerable OS versions. Typically, Apple signs current iOS versions for 7-14 days after a new release & then stops signing the old versions.

TSS (Tatsu Signing Server) is Apple's cryptographic verification system that verifies if a firmware can be installed or not. It communicates with your device during restore or update to approve or reject the installation.

What devices are supported?

Signing status tools support all iPhones and iPads, from older models to the latest releases. You can check firmware availability of all Apple devices.

What is a signed IPSW?

A signed IPSW is a firmware file that Apple's activation servers currently accept. Only signed versions can be installed via iTunes or Finder on your device.

How do I know if iOS is currently signed?

Use our free, reliable & simple iOS Signing Status checker page. It will instantly show whether your desired IPSW firmware is still being signed and installable on your device.

Is iPadOS 9.3.6 Still Signed?

✅ Currently Signed

As of October 8, 2026: Apple is currently signing iPadOS 9.3.6 for 10 devices. A Signed status means Apple's servers are currently authorizing installation of this firmware. Check the status and select your device model below to download the signed IPSW firmware file to upgrade, downgrade, or restore easily via Finder (macOS) or iTunes (Windows).

tss_checker — IPSW Guide

➜ Initializing connection to gs.apple.com...

➜ Handshake established [TLS 1.3]

➜ Fetching signing matrix for iPadOS 9.3.6...

✓ iPadOS 9.3.6 is currently signed by Apple

Last updated: Oct 8, 2026, 05:05 PM

📋 Firmware Details

OSiPadOS 9.3.6

Build ID13G37

ReleasedJuly 22, 2019 (7 years ago)

Status ✅ Signed - can restore via iTunes/Finder

Devices10 compatible iPadOS devices

📱 Currently Signed iPadOS Devices 10

← Back to all signed versions

What is iOS IPSW signing?

iOS signing is one of key to keeping Apple devices secure. It controls which firmware versions can be installed through iTunes or finder, Apple ensures that users are always running software with the latest security patches, performance improvements, and bug fixes.

This system also reduce the risks by blocking outdated and vulnerable iOS versions, making it harder for attackers to exploit known weaknesses or use them for jailbreak methods.

How to Check Apple Signing Status?

Apple TSS (Tatsu Signing Server) verifies whether a specific iOS version is still authorized or not. To check this, you can bookmark this page we continuously monitor Apple’s servers. as of (current date) We listed all the currently signed version iOS or iPadOS version & links to download the signed version for each iPhone or iPad models.

We keep monitoring, ensuring users to get the most accurate and up-to-date information. This is important because Apple can stop signing a version at any time & by checking signing status, you can avoid errors during installation and choose a right iOS version for your device..

Is iPadOS 9.3.6 Still Signed?

📱 Currently Signed iPadOS Devices 10

What is iOS IPSW signing?

How to Check Apple Signing Status?

Frequently Asked Questions