13D Filing: RPL Holdings Ltd Goes Activist on NQ Mobile Inc. (NQ)

EXHIBIT A

JOINT FILING AGREEMENT

In accordance with Rule 13d-1(k) under the Securities Exchange Act of 1934, as amended, each of the undersigned hereby agrees to the joint
filing on behalf of each of them of a statement on Schedule 13D (including amendments thereto) with respect to the common shares, par value $0.0001 per share, of NQ Mobile Inc., a Cayman Islands company, and that this Agreement be included as an
Exhibit to such joint filing. Each of the undersigned acknowledges that each shall be responsible for the timely filing of any statement (including amendments) on Schedule 13D, and for the completeness and accuracy of the information concerning
him or it contained therein, but shall not be responsible for the completeness and accuracy of the information concerning the other persons making such filings, except to the extent that he or it knows or has reason to believe that such information
is inaccurate.

Date: February 16, 2016

[Signature pages to follow]