[g72942kui001.gif]Exhibit 10.33.1

SECOND AMENDMENT

This Second Amendment to Lease is made and entered into as of this 24th day of
October 2003 by and between Desert Vista, LLC an Arizona limited liability
company (“Landlord”) and Mountain Telecommunications, Inc. the (“Tenant”) having
a place of business at 7850 South Hardy Drive, Suite 107 and 110, Tempe, Arizona
85281.

RECITALS

A.      Landlord and Tenant have hereto entered into that certain Lease
Agreement dated September 24, 1999 and as amended by that certain First
Amendment to Lease dated September 2, 2003 herein collectively called (the
“Lease”) for the rental of certain premises described as Desert Vista Commerce
Center, 7850 South Hardy, Suite 107 and 110, Tempe, Arizona 85281 (the
“Premises”) consisting of approximately 9,527 square feet and as more
particularly described in the Lease upon the terms, covenants, provisions and
conditions set forth in the said Lease, and

B.        Landlord and Tenant desire to modify the terms of the Lease subject to
the terms and conditions set forth in this Agreement.

AGREEMENT

NOW, THEREFORE, FOR VALUE RECEIVED AND HEREBY ACKNOWLEDGED, in consideration of
the mutual covenants herein contained, Landlord and Tenant hereby agree as
follows:

1.         This Second Amendment to Lease shall be deemed to be effective as of
January 1, 2004 (the “Effective Date”).

2.         The term of the Lease shall be and hereby is amended for a period of
six (6) years and two (2) months such that the term of the Lease shall expire on
February 28, 2010 (the “Term Expiration Date”). Any provision of the Lease
providing for the expiration of the Lease on a date earlier than the Term
Expiration Date are hereby amended and superseded by this paragraph.

3.         As of the Effective Date, the Monthly Rent that the Tenant shall pay
for the remainder of the Term, (i.e., commencing with and after the Effective
Date) is as follows:

1/1/04 — 12/31/04 - $8,383.76 ($. 88 NNNpsf) per month + applicable tax

1/1/05 — 12/31/05 - $8,669.57 ($. 91 NNNpsf) per month + applicable tax

1/1/06 — 12/31/06 - $8,955.38 ($. 94 NNNpsf) per month + applicable tax

1/1/07 — 12/31/07 - $9,241.19 ($. 97 NNNpsf) per month + applicable tax

1/1/08 — 12/31/08 - $9,527.00 ($1.00 NNNpsf) per month + applicable tax

1/1/09 — 02/28/10 - $9,812.81 ($1.02 NNNpsf) per month + applicable tax

4.         Landlord shall provide at his sole cost the improvements outlined on
the attached proposal. Any additional tenant improvements shall be the
responsibility of the Tenant.

5.         Parking is allocated on the basis of 4/1000.

EXCEPT as amended herein, the terms and conditions of the Lease shall in all
respects remain in full force and effect without modifications.

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IN WITNESS WHEREOF, the parties hereto have signed this Second Amendment on the
date previously written.

LANDLORD

 

TENANT

 

 

 

Desert Vista, LLC

 

Mountain Telecommunications, Inc.

An Arizona limited liability company
By: Victoria Properties Management, LLC
As Agent for Owner

 

 

By: 

/s/ Kenneth R. Matheson

 

 

By: 

/s/ Wilmont Wickramasuria

 

 

Kenneth R. Matheson

 

 

Wilmont Wickramasuria

 

 

 

 

 

Its:

Member, Manager

 

 

Its:

President

 

 

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