Exhibit 31.2

                            CERTIFICATION PURSUANT TO
           18 U.S.C. SECTION 1350, AS ADOPTED PERSUANT TO SECTION 302
                        OF THE SARBANES-OXLEY ACT OF 2002

I, Antonio Estrada, certify that:

     1.   I have reviewed this quarterly report on Form 10-QA of ATSI
          Communications, Inc., a Delaware Corporation;
     2.   Based on my knowledge, this quarterly report does not contain any
          untrue statement of a material fact or omit to state a material fact
          necessary to make the statements made, in light of the circumstances
          under which such statements were made, not misleading with respect to
          the period covered by this report;
     3.   Based on my knowledge, the financial statements, and other financial
          information included in this report, fairly present in all material
          respects the financial condition, results of operations and cash flows
          of the registrant as of, and for, the periods presented in this
          report;
     4.   The registrant's other certifying officer and I are responsible for
          establishing and maintaining disclosure controls and procedures (as
          defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) for the
          registrant and have:

          a)   Designed such disclosure controls and procedures, or caused such
               disclosure controls and procedures to be designed under our
               supervision, to ensure that material information relating to the
               registrant, including its consolidated subsidiaries, is made
               known to us by others within those entities, particularly during
               the period in which this report is being prepared;
          b)   Evaluated the effectiveness of the registrant's disclosure
               controls and procedures and presented in this report our
               conclusions about the effectiveness of the disclosure controls
               and procedures, as of the end of the period covered by this
               report based on such evaluation; and
          c)   Disclosed in this report any change in the registrant's
               disclosure controls and procedures that occurred during the
               registrant's most recent fiscal quarter (the registrant's fourth
               fiscal quarter in the case of an annual report) that has
               materially affected, or is reasonably likely to materially
               affect, the registrant's disclosure controls and procedures; and

     5.   The registrant's certifying officer and I have disclosed, based on our
          most recent evaluation of disclosure controls and procedures, to the
          registrant's auditors and the audit committee of registrant's board of
          directors (or persons performing the equivalent function):

          (a)  all significant deficiencies in the design or operation of
               disclosure controls and procedures which are reasonably likely to
               adversely affect the registrant's ability to record, process,
               summarize and report financial information; and
          (b)  Any fraud, whether or not material, that involves management or
               other employees who have a significant role in the registrant's
               disclosure controls and procedures.

By /s/ Antonio Estrada
Antonio Estrada
Corporate Controller
December 31, 2003


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