(b)(4).A visual, dimensional and functional inspection of the device involved in the complaint could not be conducted since the device was not returned at the time of this report.A device history record review could not be conducted since the lot number provided (454387087) is not a valid lot number.Customer complaint cannot be confirmed based only on the information provided.In order to perform a proper investigation and determine the source of the alleged defect reported, it is necessary to evaluate the sample involved in this complaint.If the device sample becomes available at a later date this report will be updated.
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