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User Guide - Apple Watch | Phonecheck Help Center

This article explains how to properly prepare an iPhone and process Apple Watches using Phonecheck. Follow the steps below to ensure successful pairing, diagnostics, and erasure.

Phonecheck Minimum Requirements
​
Phonecheck 3 - Version: 3.12.6
iOS App - Version: 3.1.316

System Requirements

Hardware Requirement

  • Latest Desktop 3.0 build

  • iPhone with a minimum iOS 17, 18, and 26

  • Apple Watch with a minimum OS 10, 11, or 26

Supported Devices

  • Phonecheck Desktop Version 3.12.6 and above

  • iOS 17 and above for Apple iPhone Host Device

  • Watch OS 10 for Apple Watch (Series 4 and higher)

Device Information DB

Non Supported Devices

  • Non-Genuine Apple Watch

  • Watches whose parent company is other than Apple

  • Apple Watch Series 1, 2, and 3 – max out at watchOS 9

Important Info

  • To use Phonecheck 3.0 with an iPhone, please ensure a cable is connected to the iPhone.

  • First, pair the watch with the iPhone to begin testing the Apple Watch

  • If you need to test multiple Apple Watches simultaneously, connect a separate iPhone for each watch to Phonecheck 3.0

  • Please note that only one Apple Watch can simultaneously be paired with each iPhone

 

Apple Watch and iPhone pairing compatibility

iOS Version (Host Device)

Minimum Required watchOS Version

Notes

iOS 26

watchOS 26

watchOS 11 and lower will require an update to pair

iOS 18

watchOS 11

watchOS 10 and lower will require an update to pair

iOS 17

watchOS 10

watchOS 9 and lower will require an update to pair


Video Tutorial

Watch the full walkthrough below for a visual guide.
​

 

Getting Started

1

Peripherals and Hardware needed to get started with Watch Diagnostics

To begin diagnosing or testing an Apple Watch using Phonecheck, ensure you have the following equipment ready:

  • Apple Watch – The device to be tested.

  • Mac or Windows PC – Must have the Phonecheck 3.0 application running.

  • Apple Watch Charger – Required for charging during tests such as the Wireless Charging test.

  • Stable Internet Connection – Needed to sync Apple Watch data and test results with the cloud.

  • iPhone – Must be connected to the PC running Phonecheck 3.0 via USB cable.

2

Performing Testing with the Apple Watch Diagnostics App

To begin testing an Apple Watch using Phonecheck, follow these steps:
​

1. Launch Phonecheck 3.0

  • Open the Phonecheck 3.0 application on your Mac or Windows PC.

  • Select "Mode" -> “iWatch Diagnostics” on the desktop interface.

2. Prepare the iPhone

  • Connect your iPhone to the desktop via USB.

  • Phonecheck will automatically install the required Phonecheck app on the iPhone.

3. Pair the Apple Watch

  • Pair the Apple Watch with the connected iPhone.

  • Once paired, the Phonecheck Diagnostics App will be automatically installed on the Apple Watch.

4. Device Information & Checks

  • While setting up, the desktop app will fetch essential information from the Apple Watch, including:

    • iWatch Details

    • iCloud Connection Check

5. Begin Hardware and Sensor Testing

The Apple Watch Diagnostics App enables testing of key components, including:

  • WiFi

  • Bluetooth

  • Compass

  • GPS

  • Accelerometer

  • Heart Sensor

  • Speaker

  • Microphone

  • Display

  • Buttons

  • Charging

3

Sync Data to the Cloud

All the data collected during testing will be synced to the Phonecheck Cloud dashboard. This online dashboard gives a complete view of all Apple Watch Diagnostic results and statuses in one place.




Preparing the iPhone

Before processing any Apple Watch, the iPhone must be fully prepared.
This setup is required only once — you won’t need to repeat it for each watch.

  1. Connect a clean iPhone

    • Make sure the iPhone is not paired with any Apple Watch.

    • The iPhone must be reset or erased.
      ​(You can erase the device directly through the Phonecheck Desktop app.)
      ​

  2. Supervise the iPhone and install the Wi-Fi profile

    • During supervision, use the QR code method to install the Wi-Fi profile.
      ​

  3. Enable Location Services

    • On the iPhone, go to:
      ​Settings → Privacy & Security → Location Services → ON

    ⚠️ Important: Do not open the Phonecheck app yet.
    This step ensures the app can properly detect and prepare for Apple Watch pairing. (This edge case will be resolved in an upcoming release.)
    ​

  4. Open the Phonecheck app on the iPhone

    • Launch the app and allow all permissions when prompted.
      ​

  5. Verify readiness for pairing

    • Confirm that the Apple Watch Pairing Screen appears on both:

      • The Phonecheck app on the iPhone

      • The Phonecheck Desktop Device Box

    • Once visible, the iPhone is fully prepared for Apple Watch testing.

       

 

Processing Apple Watches

After the iPhone is prepared, you can begin testing Apple Watches.

  1. Pair the Apple Watch

    • Open the Watch app on the iPhone and start pairing the first Apple Watch.
      ​

  2. Wait for profile installation

    • After pairing:

      • The Phonecheck mobile app will display an Apple Watch icon with status “Preparing Apple Watch.”

      • The Phonecheck Desktop app will show the paired Apple Watch details, including battery level.
        ​

  3. Install the Phonecheck app on the Apple Watch

    • Since the Supervision Flow is used, you must manually install the app:

      • Open the Watch app → Available Apps

      • Tap Install next to Phonecheck
        ​

  4. Open the Phonecheck app on both devices

    • Launch the Phonecheck app on the iPhone and the Apple Watch.

    • This activates the Apple Watch license and starts the diagnostics.
      ​

  5. Completion and erasure

    • When the process completes:

      • If Auto Erase is enabled, the Apple Watch will erase automatically.

      • Otherwise, you can erase manually by pressing the 🗑 Delete icon in the Device Box on the Desktop.
        ​

  6. Generate the Erase Certificate

    • After erasure, an Erase Certificate will automatically generate.

    • You can now go ahead and pair and process the next Apple Watch.

    • You don't need to re-prepare the iPhone between watches.

       


Tips & Notes

  • The iPhone preparation is a one-time setup — reuse the same iPhone for multiple Apple Watches.

  • If the pairing or “Begin Test” screen doesn’t appear:

    • Verify all permissions are granted.

    • Ensure the Phonecheck app is installed on both the iPhone and the Apple Watch.

  • Future Phonecheck updates will further automate this process, reducing manual steps.
  • You can pull Battery Health manually if needed by selecting the "..." three dots button on the Device Square UI