The luggage label is transferred to the BAGTAG from within the airline's mobile app. This option is available after check-in. BAGTAG only works with connected airlines. For more information on how to update the tag, please check your airline's website.
The BAGTAG Flex makes use of Near Field Communication Technology (NFC). In order to update the Electronic Bag Tag, look at the image below to see how to use NFC with different types of phones.
The complete BAGTAG Flex manual can be found in the attachments.