Joint Filing Agreement
Exhibit 2
In accordance with Rule 13d-1(k) under the Securities Exchange Act of 1934, as amended, each of the
persons named below agrees to the joint filing of a statement on Schedule 13D (including amendments
thereto) with respect to the ordinary shares, par value HK$0.10 per share, of China Unicom (Hong
Kong) Limited, a corporation organized under the laws of Hong Kong, and further agrees that this
Joint Filing Agreement be included as an exhibit to such filings, provided that, as contemplated by
Section 13d-1(k)(1)(ii), no person shall be responsible for the completeness or accuracy of the
information concerning the other persons making the filing, unless such person knows or has reason
to believe that such information is inaccurate. This Joint Filing Agreement may be executed in any
number of counterparts, all of which taken together shall constitute one and the same instrument.
Dated: October 24th, 2008
| TELEFÓNICA, S.A. |
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| By: | /s/ Xxxxx Xxx Xxxxxxx Xxxxxxxxx | |||
| Name: | Xxxxx Xxx Xxxxxxx Xxxxxxxxx | |||
| Title: | Group General Vice Counsel | |||
| TELEFÓNICA INTERNACIONAL, S.A.U. |
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| By: | /s/ Xxxx Xxxxxx Xxx Xxxxxxxxx | |||
| Name: | Xxxx Xxxxxx Xxx Brugueras | |||
| Title: | Attorney | |||
