Follow the following steps: Find your serial number Turn the iPhone on.Head  to the Application for Settings. Tap the “General” tab. Choose the section called “About.” Click and scroll until you’ve seen the phrase “Serial Number.” Copy the number and consider writing it down to your records  Checking the website for Apple Support Open the browser on your computer or from another device. Browse to https://selfsolve.apple.com/agreementWarrantyDynamic.do. The page should read, “Check your service coverage and support coverage.” In the open field, paste your serial number. If applicable, select your country. Press the “Continue” button. Search for your iPhone. Simply tap the link that says, “See the coverage of your service and support.” See the status of your warranty on this page. This will inform you if the original warranty has expired or is still valid.

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