Exhibit 31.2

Rule 13a-14(a) Certification

I, Stephen Katz, certify that:

| | 1. | I have reviewed this amended quarterly report of Cellular Technical Services Company, Inc.;                                                                                                                                                                                                               
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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(s) 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:                                                      

(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; (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 (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


| | 5. | The small business issuer's other certifying officer(s) 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 the 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 (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.


By:
      /s/Stephen KatzStephen KatzChief Executive OfficerAugust
              24,2007


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