Report: Apple uses two microscopic QR codes on iPhone displays to track defects, which has helped cut its suppliers' faulty screen report rates from 30% to 10% (William Gallagher/AppleInsider) 29-09-2023

William Gallagher / AppleInsider:
Report: Apple uses two microscopic QR codes on iPhone displays to track defects, which has helped cut its suppliers’ faulty screen report rates from 30% to 10% — Apple spent millions to add a barcode to iPhone displays in order to save being charged hundreds of millions by manufacturers claiming faulty screens that may not have been.