To opt out of AtData's mobile device services, you will need to locate and enter your Advertising ID. This ensures that we no longer collect or provide information about your mobile device.
To locate your Advertising ID on Android devices:
Settings // Google Services // Ads // Your Advertising ID
To locate your Advertising ID on iOS devices:
An easy way to find your device's IDFA value is to use an app called The Identifiers. After launching the app, you can find your device's IDFA listed in the middle of the screen.