**Exhibit      31.2 **

| 1.   | I              have reviewed this Quarterly Report on Form 10-QSB of ATSI Communications,              Inc., a Nevada Corporation; |
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|   | 2. | Based                on my knowledge, this 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; |
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|   | 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                small                business issuer as of, and for, the periods presented in this                report; |
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|   | 4. | The                small business issuer’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 small                business issuer and have: |
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| 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 small business issuer, 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; |
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| b)   | Evaluated              the effectiveness of the small business issuer’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 |
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| c)   | Disclosed              in this report any change in the small business issuer’s internal control              over financial reporting that occurred during the small business issuer’s              most recent fiscal quarter (the small business issuer’s fourth fiscal              quarter in the case of an annual report) that has materially affected,              or              is reasonably likely to materially affect, the small business issuer’s              internal control over financial reporting;              and |
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|   | 5. | The                small business issuer’s other certifying officer and I have disclosed,                based on our most recent evaluation of internal control over financial                reporting, to the small business issuer’s auditors and the audit committee                of small business issuer’s board of directors (or persons performing the                equivalent functions): |
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|  | (a) | All                significant deficiencies and material weaknesses in the design or                operation of internal control over financial reporting which are                reasonably likely to adversely affect the small business issuer’s ability                to record, process, summarize and report financial information; and |
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|  | (b) | Any                fraud, whether or not material, that involves management or other                employees who have a significant role in the small business issuer’s                internal control over financial                reporting. |
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| By     | /s/                  Antonio Estrada                                                                                                   |   |   |   |
|   | Antonio                    Estrada Corporate                    Controller and Chief Financial OfficerJune                    14, 2007 |   |   |   |
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