Exhibit 31.1

Rule 13a-14(a) Certification

I, Kenneth
Block, certify that:

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| | -- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
| | 1. | I have
 reviewed this quarterly report of Cellular Technical Services Company, Inc.;                                                                                                                                                                                                                                                    
| |    |                                                                                                                                                                                                                                                                                                                                          |                                                                                                                                                                                                                                                                                                                                                                                                                                              
| | 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;                          
| |    |                                                                                                                                                                                                                                                                                                                                          |                                                                                                                                                                                                                                                                                                                                                                                                                                              
| | 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;                                  
| |    |                                                                                                                                                                                                                                                                                                                                          |                                                                                                                                                                                                                                                                                                                                                                                                                                              
| | 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):
| |    |                                                                                                                                                                                                                                                                                                                                          |                                                                                                                                                                                                                                                                                                                                                                                                                                              
| |    |                                                                                                                                                                                                                                                                                                                                          | (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/Kenneth
 Block       | 
| |     |                         | 
| |     | Kenneth Block           | 
| |     | Chief Financial Officer | 
| |     | November 19, 2007       | 
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