In the UWP/WinX client, the device id is created using the [https://docs.microsoft.com/en-us/uwp/api/windows.system.profile.hardwareidentification.getpackagespecifictoken| ASHWID identifier] encoded to a Base64 string.
=== Android ===
On the native Android client, the [https://developer.android.com/reference/android/provider/Settings.Secure#ANDROID_ID| ANDROID_ID (SSAID)] is accessed. Before Android 8, this ID was bound to a device for its lifetime. Since Android 8, the ID is different for every user (if the device has the multi-user feature enabled) and when the device is reset. On the Android Xamarin app , before version 1.0.80, depending on the version of the OS, the [https://developer.android.com/reference/android/os/Build#SERIAL| Build.SERIAL] is reinstalledaccessed (below Android 8), and [https://developer.android.com/reference/android/os/Build#getSerial()| Build.getSerial] starting with Android 8, also requiring the <code>READ_PHONE_STATE</code> permission. With Android 10, the function only works for devices enrolled in an organization. Version 1.0.80 of the Xamarin Android app based the device ID onto the [https://developer.android.com/reference/android/provider/Settings.Secure#ANDROID_ID| ANDROID_ID (SSAID)], in the same way to how the native Android client does it. This also removed the need for the <code>READ_PHONE_STATE</code> permission. [[Category:Android|Device ID]][[Category:Device management|Device ID]][[Category:Hardware|Device ID]][[Category:WinX|Device ID]][[Category:Xamarin|Device ID]]
On the Android Xamarin app, depending on the version, the [https://developer.android.com/reference/android/os/Build#SERIAL| Build.SERIAL] is accessed (below Android 8), and [https://developer.android.com/reference/android/os/Build#getSerial()| Build.getSerial] starting with Android 8, also requiring the <code>READ_PHONE_STATE</code> permission. With Android 10, the function only works for devices enrolled in an organization.
=== iOS ===
On iOS, the application makes use of the [https://developer.apple.com/documentation/uikit/uidevice/1620059-identifierforvendor| identifierForVendor]. This is a GUID uniquely identifying a device to an app vendor.