AGREEMENT In accordance with Reg. S. 13d-1(f)(1), the undersigned each hereby agrees that Hutchison Whampoa Limited shall file on behalf of each of them this Schedule 13D relating to the Common Stock, no par value, in VoiceStream Wireless Corporation,...

 
                                                                       EXHIBIT 1

                                   AGREEMENT

               In accordance with Reg. S. 13d-1(f)(1), the undersigned each
     hereby agrees that Xxxxxxxxx Whampoa Limited shall file on behalf of each
     of them this Schedule 13D relating to the Common Stock, no par value, in
     VoiceStream Wireless Corporation, to which this Agreement is an Exhibit and
     such statements and amendments thereto as may be required to be filed with
     the United States Securities and Exchange Commission.

     Dated:  May 13, 1999


                              FOR AND ON BEHALF OF
                              XXXXXXXXX WHAMPOA LIMITED



                              By: /s/ Chow Woo Mo Xxxx, Xxxxx
                                  --------------------------------------------
                                  Name: Chow Woo Mo Xxxx, Xxxxx
                                  Title: Director


                              FOR AND ON BEHALF OF
                              XXXXXXXXX TELECOMMUNICATIONS
                              PCS (USA) LIMITED



                              By: /s/ Khoo Chek Ngee
                                  ------------------------------------
                                  Name: Khoo Chek Ngee
                                  Title: Director



                              FOR AND ON BEHALF OF
                              XXXXXXXXX TELECOMMUNICATIONS
                              HOLDINGS (USA) LIMITED



                              By: /s/ Khoo Chek Ngee
                                  ------------------------------------
                                  Name: Khoo Chek Ngee
                                  Title: Director

 
                              FOR AND ON BEHALF OF
                              XXXXXX KONG (HOLDINGS) LIMITED



                              By: /s/ Ip Tak Xxxxx, Xxxxxx
                                  ----------------------------------------
                                  Name: Ip Tak Xxxxx, Xxxxxx
                                  Title: Director