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Exhibit 31.2

CERTIFICATION PURSUANT TO RULE 13A-14(a)/15D-14(a) OF THE
SECURITIES EXCHANGE ACT OF 1934, AS ADOPTEDPURSUANT TO SECTION 302 OF
THE SARBANES-OXLEY ACT OF 2002

I, Martin S. Smiley, certify that:

|1. | I have reviewed this quarterly report on Form
    10-Q of mPhase Technologies, 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;                             
|   |                                                                                                                                                                                                                                                                                                                                                                
|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(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))
      and internal control over financial reporting (as defined in Exchange Act
      Rules 13a-15(f) and 15d-15(f)) 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;
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| |    |                                                                                                                                                                                                                                                                                                                                                                                                             
| | b. | designed such internal control over financial reporting,
      or caused such internal control over financial reporting to be designed
      under our supervision, to provide reasonable assurance regarding the
      reliability of financial reporting and the preparation of financial
      statements for external purposes in accordance with generally accepted
      accounting principles;       
| |    |                                                                                                                                                                                                                                                                                                                                                                                                             
| | c. | 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                                                                                                 

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| | d. | disclosed in this report any change in the registrants
      internal control over financial reporting 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 internal
      control over financial reporting; and
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|5. | The registrants other certifying officer(s) and I have
      disclosed, based on our most recent evaluation of internal control over
      financial reporting, to the registrants auditors and the audit committee
      of registrant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 registrant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
      registrants internal control over financial
reporting.                                                                                                     

Date: May 17, 2010

/s/ Martin S. SmileyMartin S. SmileyEVP, Chief
Financial Officer and General Counsel

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