From Rolex.com
Rolex added a video explaining the use of Near Field Communication technology, or NFC, on service cards. Back in October, these pages first reported Rolex had switched to an NFC-chipped service card, the two-year warranty card included when a Rolex watch returns from service. This feature first equipped original warranty cards in 2020.
The 23-second clip shows the kinds of information gleaned when a service card is placed near a smartphone. Rolex says the new service card technology is compatible with most smartphones, including versions, or newer versions, of Apple iPhone 7 with iOS 13, Samsung Galaxy S3, Huawei P9, Xiaomi Mi3, Google Nexus 4, Pixel, HTC One.
The service card data include the watch's reference and serial number, the end date of the warranty, as well as details on the service performed by Rolex.
The iPhone in the video shows a date of 28 and a time of exactly 10:10, the standard time and date displayed on all Rolex communication.