Visit this website https://checkcoverage.apple.com/ to find out the purchase date. Customers should have a purchase date one year prior to the warranty expiry date. For example, if the coverage end date is September 13, 2025, the mobile purchase date will be September 13, 2024. iPhone users can check the warranty on their mobile itself. Go to the settings section and select the 'General' option. Then by scrolling down in the 'About' section, you can see the warranty expiry date for the iPhone below.