According to Apple, a "very small percentage" of iPhone 8 devices logic board with a production error that is eligible for a free repair.
To check if you have an iPhone 8 that can be repaired under this new repair program, Apple has created a website where your serial number can be entered.
Apple states that affected entities were sold between September 201
The issue does not affect iPhone 8 Plus or other iPhone models, so just select iPhone 8 models that are eligible for a free solution.
Customers who have a Qualified Device can make an appointment with an Apple Reseller, contact an Authorized Apple Provider or arrange email service through Apple Support.
Apple states that repairs may be limited to the original country or purchase area and affected customers are recommended to back up the iPhone to iTunes or iCloud before they seek repair.
An iPhone 8 that has damage that eliminates the ability to complete the logic board repair, such as a cracked screen, needs to be resolved before Apple provides service.
The new iPhone 8 Logic Board Repair program covers affected iPhone 8 devices for three years after the first retail device.