http://developer.android.com/reference/android/provider/Settings.Secure.html#ANDROID_ID
This link says that : When a device has multiple users (available on certain devices running Android 4.2 or higher), each user appears as a completely separate device, so the ANDROID_ID value is unique to each user.
http://developer.android.com/about/versions/android-4.2.html#MultipleUsers While this link says: Beware that if your app requests one of the hardware device identifiers (such as the WiFi MAC address, the SERIAL number, or the ANDROID_ID number), they will provide the same value for each user because these identifiers are tied to the hardware and not the user.
Both are from android developer and have got me confused? Is the ANDROID_ID actually unique or not for multiple users on a single device?