If you're filling out the info on the form shown below to purchase an upgrade, be sure you're using the 14 digit Electronic Serial Number (ESN), and not the 12 digit Serial Number (SN). The first 5 digits of the
ESN are already entered for you just above the blank space, so just enter the last 9 digits of the
ESN in the blank space. Enter the 3 digits of the check sum on the next blank space.
If that doesn't work, be sure the model number and
SN (serial number) were entered correctly when you registered your scanner.
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