EXHIBIT 99.13

JOINT FILING AGREEMENT

The undersigned hereby agree that the Amendment No. 2, dated as of February 4, 2019 (the “Amendment 2”), to the Schedule 13D, dated December 8, 2017, as amended by Amendment No. 1 filed on January 16, 2019 (as amended, the “Original Schedule 13D”), with respect to the ordinary shares, par value $0.00375 per share, of UTStarcom Holdings Corp. is, and any amendments thereto executed by each of us shall be, filed on behalf of each of us pursuant to and in accordance with the provisions of Rule 13d-1(k)(1) under the Securities and Exchange Act of 1934, as amended, and that this Agreement shall be included as an exhibit to the Amendment 2 and each such amendment.  Each of the undersigned agrees to be responsible for the timely filing of the Amendment 2 and any amendments thereto, and for the completeness and accuracy of the information concerning itself contained therein.  This Agreement may be executed in any number of counterparts, all of which taken together shall constitute one and the same instrument.

IN WITNESS WHEREOF, the undersigned have executed this Agreement as of the 4th day of February, 2019.

TONGHAO (CAYMAN) LIMITED
By:	/s/ Qian Huifang
	Name: Qian Huifang
	Title: Director

TONGHAO INFORMATION TECHNOLOGY (SHANGHAI) CO., LTD.
By:	/s/ Qian Huifang
	Name: Qian Huifang
	Title: Executive Director

TONGDING GROUP CO., LTD.
By:	/s/ Shen Xiaoping
	Name: Shen Xiaoping
	Title: Legal Representative

TONGDING INTERCONNECTION INFORMATION CO., LTD.
By:	/s/ Yan Yongqing
	Name: Yan Yongqing
	Title: Chairman & CEO

[Signature Page to Joint Filing Agreement]