How NFC identification bracelets work
NFC stands for Near Field Communication. A compatible phone can read an NFC chip at close range. The phone must support the type of data stored on the chip.
Opening a web profile
A chip can store a link to an online profile. When the phone reads that link, it can open the profile in a browser. An internet connection is needed to load the web page. You may need to unlock the phone or tap a notification.
Current single-chip bracelets
Bracelets from the current production batch have one NFC chip linking to the web profile. Opening the profile requires a compatible NFC phone and an internet connection. These units do not include a second chip for storing personal information for offline reading.
Update the information in the web profile following the supplied instructions, then open it through the bracelet to check the result. The chip keeps its link to the profile.
Check your phone
Apple documents background NFC tag reading on iPhone XS and later. For a supported web link, tap the notification to open it. Earlier models require checking the reading options available for their version of iOS. On Android, check that the phone has NFC, enable it and unlock the screen.
Read the official guidance from Apple and Android. Test the bracelet with the phone you intend to use.
Choose the right model
Read each product's description, size and setup instructions before ordering. Features can differ between models.