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: |
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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; 

 

(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            Katz                                                           |
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|   |   | Stephen          KatzChief          Executive Officer        August 29, 2007

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