Serial Number
where do I find the serial number of my iPhone 8?
iPhone 8 Plus, iOS 14
Question marked as
Best reply
Settings->General->About->Serial
If you cannot access the Settings menu on the iPhones you can use the IMEI number printed on thew SIM card tray to get supper and service form Apple instead of the serial number.
More details here: link-> Find the serial number or IMEI on your iPhone, iPad, or iPod touch - Apple Support