Hacker News new | ask | show | jobs
by zie 2417 days ago
"When Limit Ad Tracking is enabled on iOS 10 or later, the Advertising Identifier is replaced with a non-unique value of all zeros to prevent the serving of targeted ads. It is automatically reset to a new random identifier if you disable Limit Ad Tracking."

From: https://support.apple.com/en-us/HT205223