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Step 2: The last test result will then appear. The Apply Blood symbol
and the code number (F-2, F-3, or F-4) will alternate on the screen.
Verify that the code number on the screen matches the code
number printed on the bottle. If the code number does not match,
the meter may give a false reading. If code does not match, use a
new strip. If code still does not match, use a new bottle of test strips or
call Customer Service at 800.566.8558 (24 hours a day, 7 days a week,
USA and Canada only).