Tap on the side menu button and select Settings, and then Card reader.
The card reader screen will display all of the card readers connected with the mobile device in your hands. In case there are more than one card reader connected with the device, you will have to perform the update for each. If you have several mobile devices (phones or tablets) each paired with a card reader, this process will have to be repeated on each pair.
Tap on the first card reader on the list in order to access the update screen. Once it pops up, please tap on the Update button.
Follow along with the progress of the update and wait for the update success confirmation.
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