UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 13D

Under the Securities Exchange Act of 1934

(Amendment No. 16)*

UTSTARCOM HOLDINGS CORP.

(Name of Issuer)

Ordinary Shares, par value US$0.00375 per share

(Title of Class of Securities)

918076100

(CUSIP Number)

Shah Capital Management, Inc.

8601 Six Forks Road, Suite 630

Raleigh, NC 27615

Telephone: +1 (919) 719-6360

(Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications)

December 4, 2015

(Date of Event Which Requires Filing of This Statement)

If the filing person has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because of §§240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the following box.  ¨

Note: Schedules filed in paper format shall include a signed original and five copies of the schedule, including all exhibits. See §240.13d-7 for other parties to whom copies are to be sent.

The information required on the remainder of this cover page shall not be deemed to be “filed” for the purpose of Section 18 of the Securities Exchange Act of 1934 (“Act”) or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).

SCHEDULE 13D

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SCHEDULE 13D

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SCHEDULE 13D

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SCHEDULE 13D

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SCHEDULE 13D

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SCHEDULE 13D

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SCHEDULE 13D

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This Amendment No. 16 is being filed jointly by Shah Capital Management, Inc. (“Shah Management”), Shah Capital Opportunity Fund LP (“Shah Opportunity”), Himanshu H. Shah (“Mr. Shah”), Hong Liang Lu (“Mr. Lu”), Lu Charitable Remainder Trust (“Lu Charitable Trust”), Lu Family Trust (“Lu Family Trust”) and The Lu Family Limited Partnership (“Lu Family Partnership”, together with Shah Opportunity, Mr. Shah, Mr. Lu, Lu Charitable Trust and Lu Family Trust, the “Reporting Persons”). The Reporting Persons have entered into a joint filing agreement, dated as of March 27, 2013, a copy of which is attached hereto as Exhibit 99.1.

Item 1. Security and Issuer.

This Schedule 13D relates to the ordinary shares, par value US$0.00375 per share (the “Ordinary Shares”), of UTStarcom Holdings Corp. (the “Company” or “Issuer”). The Company’s principal executive office is located at Level 6, Hennessy Road, Admiralty, Hong Kong.

Item 2. Identity and Background.

Shah Management is a registered investment adviser incorporated in North Carolina. The address of its principal office is 8601 Six Forks Road, Suite 630, Raleigh, NC 27615. Mr. Shah is the President and Chief Investment Officer of Shah Management.

Shah Opportunity is a Delaware Limited Partnership with its principal office at 8601 Six Forks Road, Suite 630, Raleigh, NC 27615. The general partner of Shah Opportunity is Shah Capital LLC, a Delaware limited liability company, whose principal office is at 8601 Six Forks Road, Suite 630, Raleigh, NC 27615. Mr. Shah is the Managing Member of Shah Capital LLC.

Mr. Shah is a citizen of the United States and his principal occupation is the president and chief investment officer of Shah Management. Mr. Shah’s principal business address is 8601 Six Forks Road, Suite 630, Raleigh, NC 27615.

Mr. Lu is a citizen of the United States and his principal occupation is a director of the Company. Mr. Lu’s principal business address is 10 Cassia Road, #1B, Yau Yut Chuen, Kowloon Tong, Hong Kong.

Lu Charitable Trust is organized under the laws of the State of California and its principal business is managing investments for the Lu family. Lu Charitable Trust’s principal business address is 1 Lakeside Drive, #1802 Oakland, CA 94612. Mr. Lu is the trustee of Lu Charitable Trust.

Lu Family Trust is organized under the laws of the State of California and its principal business is managing investments for the Lu family. Lu Family Trust’s principal business address is 1 Lakeside Drive, #1802 Oakland, CA 94612. Mr. Lu is a trustee of Lu Family Trust, of which Mr. Lu and his spouse are beneficiaries.

Lu Family Partnership is a Delaware limited partnership and its principal business is managing investments for the Lu family. Lu Family Partnership’s principal business address is 1 Lakeside Drive, #1802 Oakland, CA 94612. Mr. Lu is the general partner of Lu Family Partnership.

None of the Reporting Persons has, during the past five years, been convicted of any criminal proceeding (excluding traffic violations or similar misdemeanors), nor been a party to a civil proceeding of a judicial or administrative body of competent jurisdiction and as a result of such proceeding was or is subject to a judgment, decree or final order enjoining future violations of, or prohibiting or mandating activities subject to, federal or state securities laws or finding any violation with respect to such laws.

Item 3. Source and Amount of Funds or Other Consideration.

N/A

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Item 4. Purpose of Transaction.

The information set forth in Item 6 is incorporated herein by reference.

Item 5. Interest in Securities of the Issuer.

(a)-(b) The following table sets forth the beneficial ownership of Ordinary Shares of the Company for each of the Reporting Persons as of December 10, 2015.

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Shah Management, Shah Opportunity and Mr. Shah are collectively referred to as the “Shah Parties”. Mr. Lu, Lu Charitable Trust, Lu Family Trust and Lu Family Partnership are collectively referred to as the “Lu Parties”. Due to the nature of the term sheet and potential transaction described in Item 6 of this statement, the Shah Parties and the Lu Parties may be deemed to be part of a “group” (within the meaning of Section 13(d)(3) of the Exchange Act) with each other. As a result, the Shah Parties and the Lu Parties may both be deemed to beneficially own an aggregate of 6,739,932 Ordinary Shares, or 18.1% of the total outstanding Ordinary Shares. Each of the Shah Parties hereby expressly disclaims beneficial ownership of any Ordinary Shares beneficially owned by any of the Lu Parties or any other person, and does not affirm membership in a “group” (within the meaning of Rule 13(d)-5 of the Exchange Act) with any of the Lu Parties or any other person, and this Schedule 13D shall not be construed as acknowledging that any of the Shah Parties, for any or all purposes, beneficially owns any Ordinary Shares beneficially owned by any of the Lu Parties or any other person or is a member of a group with any of the Lu Parties or any other person. Each of the Lu Parties hereby expressly disclaims beneficial ownership of any Ordinary Shares beneficially owned by any of the Shah Parties or any other person, and does not affirm membership in a “group” (within the meaning of Rule 13(d)-5 of the Exchange Act) with any of the Shah Parties or any other person, and this Schedule 13D shall not be construed as acknowledging that any of the Lu Parties, for any or all purposes, beneficially owns any Ordinary Shares beneficially owned by any of the Shah Parties or any other person or is a member of a group with the Shah Parties or any other person.

Item 6. Contracts, Arrangements, Understandings or Relationships with Respect to Securities of the Issuer.

On November 4, 2015, the Shah Parties and the Lu Parties entered into a Purchase and Sale Agreement (the “Agreement”) with The Smart Soho International Limited (“Smart Soho”) setting out certain terms of a transaction for the sale of 11,739,932 Ordinary Shares held by the Shah Parties and the Lu Parties to Smart Soho at a price of US$6.00 (the “Transaction”), subject to certain closing conditions. The closing of the payment of a first tranche of 91.67% of the aggregate consideration shall take place as soon as practicable as agreed among the parties, but in no event later than December 4, 2015, and the closing of payment of a second tranche of 8.33% of the aggregate consideration shall take place as soon as practicable after the first payment, but in no event later than January 8, 2016. The Agreement provides for a reverse termination fee of US$3.0 million payable by Smart Soho to the Shah Parties and the release of US$1.0 million deposited in an escrow account to the Shah Parties under certain conditions, and a termination fee of US$4.0 million payable by the Shah Parties and the Lu Parties to Smart Soho under certain conditions. The Agreement also contains conditions which, if satisfied, would enable Smart Soho to designate a majority of the Board of Directors of the Company.

The foregoing description of the Agreement does not purport to be complete and is qualified in its entirety by reference to the Agreement, a copy of which is attached hereto as Exhibit 99.2 and is incorporated herein by reference.

On December 4, 2015, the Shah Parties and the Lu Parties entered into an Amendment to the Purchase and Sale Agreement (the “Amendment”) with Smart Soho and Phicomm Technology (Hong Kong) Co., Limited setting out certain terms including the amendments to certain terms of the Agreement and waivers of certain closing conditions set forth in the Agreement. Pursuant to the Agreement (as amended by the Amendment), the closing of the payment of 42.59% of the aggregate consideration took place on December 4, 2015, the closing of the payment of 49.08% of the aggregate consideration shall take place as soon as practicable as agreed among the parties, but in no event later than December 16, 2015, and the closing of payment of 8.33% of the aggregate consideration shall take place as soon as practicable as agreed among the parties after the foregoing payments, but in no event later than January 8, 2016.

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The foregoing description of the Amendment does not purport to be complete and is qualified in its entirety by reference to the Amendment, a copy of which is attached hereto as Exhibit 99.3 and is incorporated herein by reference.

To the best knowledge of the Reporting Persons, except as provided herein, there are no other contracts, arrangements, understandings or relationships (legal or otherwise) among the Reporting Persons and between any of the Reporting Persons and any other person with respect to any securities of the Company.

Item 7. Materials to be Filed as Exhibits.

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SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, the undersigned certify that the information set forth in this statement is true, complete and correct.

Dated:

December 11, 2015

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EXHIBIT INDEX

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Exhibit 99.3

THE SMART SOHO INTERNATIONAL LIMITED

P.O. Box 309

Ugland House

Grand Cayman, KY1-1104

Cayman Islands

December 4, 2015

To the Sellers to the

Purchase and Sale Agreement

dated November 4, 2015

Ladies and Gentlemen:

We refer to the Purchase and Sale Agreement among us dated as of November 4, 2015 (the “Agreement”). This letter agreement (the “Amendment”) sets forth our agreement with respect the amendment of certain provisions of the Agreement and the waiver of the satisfaction of certain conditions to the respective obligations of the parties. Capitalized terms used in this Amendment without definitions have the respective meanings assigned to the in the Agreement.

We agree that the Agreement shall be amended as follows:

1. Amendment of Payment Terms. Section 1.03 of the Agreement is hereby amended to read in full as follows:

(a) On the First Closing Date (as defined below), an aggregate of US$30,000,000 out of the Aggregate Purchase Price payable to the Sellers by Acquirer shall be paid solely to the Shah Sellers by the Acquirer via wire transfer of immediately available funds in U.S. dollars to one or more accounts to be designated by the Shah Sellers by notice to the Acquirer (which notice shall be delivered prior to the First Closing Date) against delivery by Shah Capital Management, Inc. and Shah Capital Opportunity Fund LP of five million (5,000,000) Ordinary Shares. In addition, on the First Closing Date, the Shah Sellers and the Acquirer shall jointly instruct the Escrow Agent (as defined in the Term Sheet) to release the Escrow Amount to one or more accounts designated by the Shah Sellers. The Acquirer agrees that notwithstanding anything to the contrary in the Term Sheet or the Agreement, in consideration of the Sellers’ agreement to the amendments set forth in this Amendment, payment of the Escrow Amount to the Shah Sellers shall not constitute payment of any portion of the Aggregate Purchase Price to any Seller.

(b) On the Second Closing Date (as defined below), an aggregate of US$34,569,626 out of the Aggregate Purchase Price payable to the Sellers by the Acquirer shall be paid to the Sellers by the Acquirer via wire transfer of immediately available funds in U.S. dollars to one or more accounts to be designated by the Sellers by notice to the Acquirer (which notice shall be delivered not later than five (5) days prior to the Second Closing Date) against delivery by the Sellers of the remaining 6,739,932 Ordinary Shares of the Sellers required to be delivered to Acquirer pursuant to the Agreement. Such payments shall be made (i) to Shah Capital Opportunity Fund LP in the amount of US$28,571,529.5, and (ii) to the Lu Sellers in the respective amounts indicated in Schedules B for First Tranche Payments. For the avoidance of doubt, the obligations of the Acquirer to make the payments required by this Section 1.03(b) are not subject to any performance of any obligation or fulfillment of any closing condition by any Seller, other than Sellers’ delivery of (i) a certificate of the Sellers as to satisfaction of the conditions set forth in clause g) of the Conditions to the Obligations of the Acquirer set forth in Schedule C to the Agreement as of the Second Closing Date, and (ii) the remaining 6,739,932 Ordinary Shares to be delivered to the Acquirer in the manner and on the terms set forth in the Agreement, as amended hereby. The aggregate payments to be made pursuant to Section 1.03(a) and this Section 1.03(b) are referred to collectively as the “First Tranche Payments.”

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(c) As soon as practicable as agreed among the Parties after the Second Closing Date but in no event later than January 8, 2016, the Acquirer shall pay the remaining aggregate amount of US$5,869,966 out of the Aggregate Purchase Price to the Sellers in the same manner as set forth in Sections 1.03(a) and 1.03(b) above (the “Second Tranche Payments”) in the respective amounts indicated in Schedules A and B for the Second Tranche Payments. For the avoidance of doubt, upon payment of the First Tranche Payments, (i) the Acquirer shall acquire full and complete ownership of the Ordinary Shares covered by each such payment, free and clear of any adverse claims, save as provided in Section 2.01(e), and (ii) the obligations of the Acquirer to pay the Second Tranche Payments are not subject to any performance of any obligation or fulfillment of any closing condition by any Seller.

2. Amendment to the definition of Closing. Section 1.04 of the Agreement is hereby amended to read in full as follows:

3. Certain Waivers. In consideration of the Parties entering into this Amendment:

(a) The Acquirer hereby waives satisfaction of the condition set forth in clause d)(ii)(D) of the Conditions to the Obligations of the Acquirer set forth in Schedule C to the Agreement requiring that, effective upon the Sellers’ receipt of the First Tranche Payments, a designee of Acquirer shall have been appointed Chief Operating Officer of the Company.

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(b) The Acquirer hereby waives satisfaction of the conditions set forth in clauses e)(i) and e)(ii) of the Conditions to the Obligations of the Acquirer set forth in Schedule C of the Agreement in respect of the 6,739,932 Ordinary Shares to be delivered by the Sellers subject to the payments by the Acquirer on the Closing Date pursuant to the Agreement, as amended, provided, however, that the Sellers shall be obligated to deliver the 6,739,932 Ordinary Shares in the manner set forth in clauses e)(i) and e)(ii) of the Conditions to the Obligations of the Acquirer set forth in Schedule C of the Agreement on the Second Closing Date upon the receipt by the Sellers of all the payments required to be made under Section 1.03(b) of the Agreement, as amended hereby.

(c) Sellers hereby severally waive any misstatement or inaccuracy in the Acquirer’s representation in Section 3.01(h) of the Agreement and any failure by Acquirer to satisfy the conditions set forth in clauses a) of the Conditions to the Obligations of the Sellers set forth in Schedule C to the Agreement resulting from any such misstatement or inaccuracy on the First Closing Date, provided, however, that nothing herein shall constitute a waiver of any of the obligations of the Acquirer to be performed on the Second Closing Date or with respect to the Second Tranche Payments.

(d) The Sellers hereby severally waive satisfaction of the condition set forth in clause d) of the Conditions to the Obligations of the Sellers set forth in Schedule C to the Agreement requiring payment of severance payment to Mr. William Wong concurrently with the Closing or immediately upon the Closing.

4. Source of Payment. The Sellers accept any payments made pursuant to the Agreement or this Amendment by the Acquirer or Phicomm Technology (Hong Kong) Co., Limited with same effect to fulfill the Acquirer’s obligation under the Agreement or this Amendment.

5. Miscellaneous. Except as otherwise expressly provided by this Amendment, all of the terms, conditions and provisions of the Agreement shall remain unchanged and in full force and effect. The Agreement, as amended hereby, shall continue in full force and effect, and this Amendment and the Agreement shall be read and construed as one instrument. This Amendment may be executed in several counterparts and by each party on a separate counterpart, each of which when so executed and delivered shall be an original, but all of which together shall constitute one instrument. The delivery of this Amendment by facsimile transmission or email of an executed original hereof or signature page hereto and/or the retransmission of any executed facsimile transmission hereof or signature page hereto shall be deemed to be the same as delivery of an executed original. In proving this Amendment, it shall not be necessary to produce or account for more than one such counterpart signed by the party against whom enforcement is sought. This Amendment shall be governed by and construed in accordance with the laws of the State of New York, without regard to conflicts of law principles thereof.

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If the foregoing is acceptable to you, please confirm your agreement, effective the date first set forth above, by countersigning this letter below and returning it to the undersigned.

The foregoing is accepted and agreed as of the date first above written.

[Signature Page to Amendment to Purchase and Sale Agreement]

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