How To Read The Electronic Serial Number - Fujitsu CD5425 Owner's Manual

ESN security operating procedure
[FUNC] button
Button [4]

How to read the Electronic Serial Number

Check that the unit is in standby.
Press and hold button [4], then the [FUNC] button, and
hold both for more than one second.
[ESN] appears on the display, followed by an eight-digit number;
this number is your electronic serial number (ESN). You may use
this number to identify your Eclipse CD5425 in the event of theft
recovery.
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