As we know, the old version of the register is to text the ID number, but there have some safety problems:
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If the user loses the ID number, he needs to text the order to watch the number find out.
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The ID number is a short character; if someone who isn't the real buyer uses it to register or add the device to monitor, it may leave dangerous information.
From now on, Wonlex uses the QR code to register; the QR code is unique, scan the QR code is easy to register and could not be wrong.
Note: There is still some storage using ID to register; the QR code will gradually replace the ID.
