SD57 3G Smartphone Cover Letter C224e-20181211132635 Darmuoba, S.A. de C.V

< Darmuoba, S.A. de C.V. >
Office of Engineering Technology
Federal Communications Commission
7435 Oakland Mills Road
Columbia, MD21046
Date: 11—16—2018
Subject; Request for Long Term Confidentiality
FCC ID: 2AIFYSDS7
To Whom It May Concern,
Pursuant to the provisions of the Commission‘s rules Title 47 Sections §0.457 and §0.459, we
are requesting the Commission to withhold the following attachment(s) as confidential
documents from public disclosure indefinitely
These documents contain detailed system and equipment descriptions and are considered as
proprietary information in operation of the equipment. The public disclosure of these documents
might be harmful to our company and would give competitors an unfair advantage in the market.
MSchematic Diagram
EBlock Diagram
EParts List
&Operational Description
ETune—up Procedure
It is our understanding that all measurement test reports, FCC ID label format and
correspondence during the certification review process cannot be granted as confidential
documents and this information will be available for public review once the grant of equipment
authorization is issued.
Sincerely,
Signature:
Name: Ernesj rmudez
Title: Pl‘gg‘u& (or tl.i\\C\TOY