FCC ID: XD6U304AA Smart Phone

Date: Jan 22, 2020 To:

Federal Communications Commission, Authorization & Evaluation Division, 7435 Oakland Mills Road, Columbia, MD 21046 Re: Tinno FCC ID: XD6U304AA FCC Part 15C Certification Confidentiality Request Gentlemen:

1. Long-Term Confidentiality This letter is to comply with 47 CFR 0.457 and 0.459 pertaining to confidentiality material. Tinno requests that the following documents regarding this submission for FCC ID:

XD6U304AA be kept confidential:

Exhibit Type Operational Description Part list Tune up File Name Operational Description.pdf BOM.pdf Tune up.pdf 2. Short-Term Confidentiality Pursuant to Public Notice DA 04-1705 of the Commissions policy, in order to comply with the marketing regulations in 47 CFR 2.803 and the importation rules in 47 CFR 2.1204, applicant hereby requests Short-Term Confidential treatment of the following materials until 180 days after the Grant Date of Equipment Authorizations. Exhibit Type Internal Photos Users Manual Setup Photos External Photos File Name Internal Photos.pdf User Manual.pdf Setup Photos.pdf External Photos.pdf Those documents contain detailed system and equipment description and related information about the product which FCC ID: XD6U304AA considers to be confidential proprietary, a custom design and, otherwise, not releasable to the general public. Since this design is a basis form which future technological products will evolve, Tinno considers this information would be of benefit to its competitors, and that the disclosure of the information in these documents would give competitors an unfair advantage in the market. Signature

Job Title and Dept.

: Product Certification Manager

TINNO 2020-02-02 Federal Communications Commission Office of Engineering and Technology Equipment Authorization Division 7345 Oakland Mills Road Columbia, Maryland21046 Subject: FCC Class II Permissive change for FCC ID: XD6U304AA(Model:U304AC) To Whom It May Concern, This is to request a Class II Permissive change for FCC ID: XD6U304AA(Model:U304AC) granted on JBP: 02/02/2020 DSS: 02/02/2020 DTS: 01/22/2020 PCE: 01/22/2020 The Major change filed under this application is as below, otherwise are identical. 1. Main components changes: B12 Dup, WIFI SAW. 2. Bluetooth changes: WIFI SAW. 3. WIFI changes: WIFI SAW. 4. TP/LCD/Camera changes: Front camera 2M=>5M. 5. Use new metal front/back cover or keypad: Color and texture on back cover. Thank you. Sincerely, Name: Xiaoping.Li Title: Product certification manager Company Name: Shenzhen Tinno Mobile Technology Corp. Company name: Shenzhen Tinno Mobile Technology Corp. Company address: 4/F, H-3 Building,OCT Eastern lndustrial Park. NO.1 XiangShan East Road, Nan Shan District,Shenzhen, P.R.China

Declaration of not pre-install of OTT Duo We, Shenzhen Tinno Mobile Technology Corp., as the manufacturer of U304AA FCC ID XD6U304AA, declares that this model will not pre-install OTT Duo though it employs Android OS. The end-user could install OTT Duo after purchase this product. So there is no need to test OTT Duo according to KDB 285076 DO3 HAC FAQ v01 Q1. APPROVED BY:

Project Manager Signature:

Date: 1/2/2020

TINNO 2020-01-22 Federal Communications Commission Office of Engineering and Technology Equipment Authorization Division 7345 Oakland Mills Road Columbia, Maryland21046 Subject: FCC Class II Permissive change for FCC ID: XD6U304AA To Whom It May Concern, This is to request a Class II Permissive change for FCC ID: XD6U304AA, originally granted on 05/23/2019. We request to update PCE/DTS/JBP/DSS grants. The Major change filed under this application is as below, otherwise are identical. 1The hardware remains unchanged and the software starts WIFI Calling to apply for certification. Since it will not affect JBP/DSS related performance, we do not request Part15B and Part15C EDR testing or report issuing. Thank you. Sincerely, ____________________ Name: Xiaoping.Li Title: Product certification manager Company Name: Shenzhen Tinno Mobile Technology Corp. Company name: Shenzhen Tinno Mobile Technology Corp. Company address: 4/F, H-3 Building,OCT Eastern lndustrial Park. NO.1 XiangShan East Road, Nan Shan District,Shenzhen, P.R.China

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Shenzhen Tinno Mobile Technology Corp Date: 2019/5/5 To: Federal Communications Commission, Authorization & Evaluation Division, 7435 Oakland Mills Road, Columbia, MD 21046 And American Certification Bady, Inc. 6731 Whittier Avenue Suite C110 McLean, VA 22101 To Whom It May Concern:

INO, the undersigned, hereby authorizes CTTL, Telecommunication logy Labs, CAICT to act on the behalf of the &inno solely in matters relating to the application for an FCC equipment authorization for aS XD6UB including the signing of documents in connection this Application. Necessary acts carried out CTTL, Telecommunication Technology Labs, CAICT on our behalf of the i nection with the Application shall have the same effect as acts of the @. also hereby certify that no party to this application is subject to a denial of benefits, including FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C. 862. The |

Tech Thank you for your attention to this matter. Yours Sincerely,

To: Federal Communications Commission, Authorization & Evaluation Division, 7435 Oakland Mills Road, Columbia, MD 21046 FCC Part 15C Certification Confidentiality Request Gentlemen:

1. Long-Term Confidentiality

\ be kept confidential:

Exhibit Type File Name Block Diagram Block Diagram.pdf Schematics Circuit Diagram.pdf Operational Description Operational Description.paf Part list BOM. pdf Tune up Tune up.pdf 2. Short-Term Confidentiality applicant hereby requests Short-Term Confidential treatment of the following 180 days after the Grant Date of Equipment Authorizations, Exhibit Type File Name Internal Photos Internal Photos. pdf User's Manual User Manual. pdf Setup Photos Setup Photos.pdf External Photos External Photos. pdf Signature 2 oF iaepad LQ Job Title and Dept. : Byog sts that the following documents regarding this submission for FCC ID:

Shenzhen Tinno Mobile Technology Corp Declaration To whom it may concern:

This is a WLAN/Bluetooth combination antenna with FCC ID: XO 044A. This WLAN/Bluetooth co-existence mechanism is to ensure that the WLAN and Bluetooth transmitters would i simultaneously operate. Therefore, WLAN and Bluetooth antenna in Hp : should not be considered to be able to transmit simultaneously. Though the users can use WLAN and Bluetooth simultaneously, but the real situation is that WLAN and Bluetooth are used by time sharing and no overlap transmission. Should you have any question, please have my best attention. 4 t . Signature : aopid Ly Print Name: Xiaoping.li Job Title and Dept:Product certification manager

Shenzhen Tinno Mobile Technology Corp Declaration 10, declare that the device, FCC ID:

, don't operate on Channels 12 and 13. US 2.4G channel 12-13 and Country code selection are disabled through proprietary software and are not user changeable, Should you have any question or comment regarding this matter, please do not hesitate to contact me. Sincerely yours, Signature: eared Li Printed Name: Xiaoping.li Position: Product certification manager