EXHIBIT 99(c) JOINT FILING AGREEMENT In accordance with Rule 13d-1(k)(1) under the Securities Exchange Act of 1934, as amended, the persons below agree to the joint filing on behalf of each of them of a Statement on Schedule 13D with regard to the...

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                                                                   EXHIBIT 99(c)

                             JOINT FILING AGREEMENT

         In accordance with Rule 13d-1(k)(1) under the Securities Exchange Act
of 1934, as amended, the persons below agree to the joint filing on behalf of
each of them of a Statement on Schedule 13D with regard to the Common Stock,
$0.01 par value, of Wireless One, Inc., a Delaware corporation, and further
agree that this Joint Filing Agreement be included as an exhibit to such joint
filing. In evidence thereof the undersigned hereby execute this Agreement as of
the fifth day of March, 1999.

                                            HEARTLAND WIRELESS 
                                            COMMUNICATIONS, INC.




                                            By: /s/ J. Xxxxxx Xxxxxxxxx 
                                               ---------------------------------
                                                Name:  J. Xxxxxx Xxxxxxxxx
                                                Title: Senior Vice President and
                                                       General Counsel


                                            WIRELESS LEASING, INC.




                                            By: /s/ J. Xxxxxx Xxxxxxxxx
                                               ---------------------------------
                                                Name:  J. Xxxxxx Xxxxxxxxx
                                                Title: Senior Vice President and
                                                       General Counsel






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