As filed with the Securities and Exchange Commission on March 19, 2018

FORM 20-F/A

(Amendment No. 1)

(Mark One)

¨           REGISTRATION STATEMENT PURSUANT TO SECTION 12(b) OR (g) OF THE SECURITIES EXCHANGE ACT OF 1934

OR

x          ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the fiscal year ended December 31, 2017

OR

¨           TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

OR

¨           SHELL COMPANY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

Commission file number: 001-14475

TELEFÔNICA BRASIL S.A.
(Exact name of Registrant as specified in its charter)

TELEFÔNICA BRAZIL S.A.
(Translation of Registrant’s name into English)

Federative Republic of Brazil
(Jurisdiction of incorporation or organization)

Avenida Engenheiro Luis Carlos Berrini, 1376, 28º andar
04571-936 São Paulo, SP, Brazil
(Address of principal executive offices)

David Melcon Sanchez-Friera

Telephone +55 11 3430 3687

Avenida Engenheiro Luis Carlos Berrini, 1376, CEP 04571-936, São Paulo, SP, Brazil

Email: ir.br@telefonica.com
(Name, Telephone, Email and/or Facsimile and Address of Company Contact Person)

Securities registered or to be registered pursuant to Section 12(b) of the Act:

*      Not for trading purposes, but only in connection with the registration on the New York Stock Exchange of American Depositary Shares representing those Preferred Shares.

Securities registered or to be registered pursuant to Section 12(g) of the Act: None

Securities for which there is a reporting obligation pursuant to Section 15(d) of the Act: None

Indicate the number of outstanding shares of each of the issuer’s classes of capital or common stock as of the close of the period covered by the annual report.

The number of outstanding shares of each class (excluding treasury shares) as of December 31, 2017 was:

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. x Yes  ¨ No

If this report is an annual or transition report, indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934. ¨ Yes  x No

Note – Checking the box above will not relieve any registrant required to file reports pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 from their obligations under those sections.

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. x Yes  ¨ No

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files) x Yes  ¨ No

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filers,” and “emerging growth company” in Rule 12b-2 of the Exchange Act. (Check one):

Large Accelerated Filer x  Accelerated Filer ¨  Non-accelerated Filer ¨  Emerging growth company ¨

If an emerging growth company that prepares its financial statements in accordance with U.S. GAAP, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards† provided pursuant to Section 13(a) of the Exchange Act. ¨

† The term “new or revised financial accounting standard” refers to any update issued by the Financial Accounting Standards Board to its Accounting Standards Codification after April 5, 2012.

Indicate by check mark which basis of accounting the registrant has used to prepare the financial statements included in this filing:

If “Other” has been checked in response to the previous question, indicate by check mark which financial statement item the registrant has elected to follow.

¨ Item 17  ¨ Item 18

If this is an annual report, indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).

¨ Yes  x No

Explanatory Note

This Amendment No. 1 to the Annual Report on Form 20-F of Telefônica Brasil S.A. (the “Company”) amends the Company’s Annual Report on Form 20-F for the year ended December 31, 2017 (the “Original 20-F”), which was filed with the Securities and Exchange Commission on February 21, 2018.  The Company is filing this Amendment No. 1 solely to furnish Exhibit 101, which was not included in the Original 20-F.  Exhibit 101 includes information about the Company in eXtensible Business Reporting Language (XBRL).

Except as described above, this Amendment No. 1 does not amend any information set forth in the Original 20-F, and the Company has not updated disclosures included therein to reflect any events that occurred subsequent to February 21, 2018.

Pursuant to Rule 406T of Regulation S-T, these interactive data files are deemed furnished and not filed or part of a registration statement or prospectus for purposes of Sections 11 or 12 of the Securities Act of 1933, as amended, and are deemed not filed for purposes of Section 18 of the Securities and Exchange Act of 1934, as amended, and are otherwise not subject to liability under those sections.