<PAGE>
                                                                   EXHIBIT 10.15

                   [CRICKET COMMUNICATIONS, INC. LETTERHEAD]



January 31, 2005


Albin F. Moschner
660 Northcroft Court
Lake Forest, IL 60045



Dear Albin:

We are pleased to offer you the position of Executive Vice President and Chief
Marketing Officer, reporting to Doug Hutcheson, Chief Executive Officer &
President.  The terms of the offer are as follows:

     1.  A starting bi-weekly salary of $11,923.08; if annualized, $310,000.

     2.  Eligibility to participate in our Bonus Plan.  You will have an
         opportunity to earn a target bonus up to 65% of your base compensation.
         The bonus payout will be based on company and individual performance.

     3.  A competitive comprehensive benefits package for you and your eligible
         dependents. Attached you will find a detailed copy of our benefits
         package for your information.

     4.  We will facilitate your relocation from Lake Forest, IL to San Diego,
         CA. A copy of our relocation package/program is enclosed for your
         review. The company will provide you with temporary living (housing)
         for one year from your date of employment. During this one year period,
         you will also be eligible for two trips per month to your primary
         residence. The company will reimburse the cost of a rental automobile
         for one year from the date of your employment or we will pay the
         reasonable and customary cost to ship your personal vehicle from
         Lake Forest, Ill to San Diego, A.

     5.  You will be eligible to participate in the company's long term
         incentive plan. Subject to and effective upon your acceptance of
         employment with the Company, the Board of Directors of Leap Wireless
         International, Inc. has granted you an award for 20,000 shares of
         restricted common stock and an option to purchase 127,660 shares of
         common stock at an exercised price of $26.55 per share or, if higher,
         the closing price of Leap's common stock on the date preceding the date
         of the option grant becomes effective.  The specifics of these awards
         will be provided to you in the form of restricted stock/stock option
         agreements.
<PAGE>
Al Moschner
January 31, 2005
Page Two

In connection with your employment by the Company, you will be required to take
and pass a drug and alcohol test, the results of a background investigation must
be acceptable to the Company, and you will be required to sign the Company's
Invention Disclosure, Confidentiality & Proprietary Rights Agreement. The Leap
Human Resources department will initiate the background investigation. Included
with this letter is a clinic passport that contains the name, address, and
telephone number of the medical center that you will go to in order to complete
your drug and alcohol test specimen collection.  Please take this passport with
you when you go for your test.

You must appear at Labcorp PSC, 71 N Waukegan Road, Suite 800, Lake Bluff, IL
60044, (847) 735-0026, (please call first before going) for your drug and
alcohol test promptly after your receipt of this offer letter.  Please be sure
to have a photo ID with you when you check in for the screening.

Please return a signed copy of this offer letter along with the attached Terms
of Employment and Invention Disclosure, Confidentiality & Proprietary Rights
Agreement. Please note that this offer is valid for five days from the date of
this letter.  If you have any questions, please do not hesitate to call me at
(858) 882 - 6015. Congratulations and welcome!

Sincerely,

/s/ Leonard C. Stephens

Leonard C. Stephens
Sr Vice President, Human Resources










I accept the offer of employment made to me by Cricket Communications, Inc. and
agree to the terms set forth above.

Offer accepted:    Albin F. Moschner            /s/ Albin F. Moschner
                  -------------------          -----------------------
                     Printed Name                    Signature