LIMITED POWER OF ATTORNEY FOR
SECTION 16 REPORTING OBLIGATIONS



	Know all by these presents, that the undersigned's hereby constitutes
and appoints Robert J. Gilker and/or Mercedes M. Barreras as the
undersigned's true and lawful attorney-in-fact to:

(1)	execute for and
on behalf of the undersigned, in the undersigned's capacity as an officer
and/or director of NII Holdings, Inc. (the "Company") Forms 3, 4, and 5 in
accordance with Section 16(a) of the Securities Exchange Act of 1934 and
the rules thereunder;

(2)	do and perform any and all acts for and on
behalf of the undersigned which may be necessary or desirable to complete
and execute any such Form 3, 4, or 5 and timely file such form with the
United States Securities and Exchange Commission and any stock exchange or
similar authority; and

(3) take any other action of any type
whatsoever in connection with the foregoing which, in the opinion of any
such attorney-in-fact, may be of benefit to, in the best interest of, or
legally required by, the undersigned, it being understood that the
documents executed by any such attorney-in-fact on behalf of the
undersigned pursuant to this Power of Attorney shall be in such form and
shall contain such terms and conditions as such attorney-in-fact may
approve in such attorney-in-fact's discretion.

The undersigned hereby
grants to each such attorney-in-fact full power and authority to do and
perform any and every act and thing whatsoever requisite, necessary, or
proper to be done in the exercise of any of the rights and powers herein
granted, as fully to all intents and purposes as the undersigned might or
could do if personally present, with full power of substitution or
revocation, hereby ratifying and confirming all that such
attorneys-in-fact, or such attorneys-in-fact's substitute or substitutes,
shall lawfully do or cause to be done by virtue of this power of attorney
and the rights and powers herein granted. The undersigned acknowledges that
neither of the foregoing attorneys-in-fact, in serving in such capacity at
the request of the undersigned, is assuming, nor is the Company assuming,
any of the undersigned's responsibilities to comply with Section 16 of the
Securities Exchange Act of 1934.

This Power of Attorney shall remain
in full force and effect until the undersigned is no longer required to
file Forms 3, 4, and 5 with respect to the undersigned's holdings of and
transactions in securities issued by the Company, unless earlier revoked by
the undersigned in a signed writing delivered to each of the foregoing
attorneys-in-fact.

IN WITNESS WHEREOF, the undersigned has caused
this Power of Attorney to be executed as of this 12th day of November,
2002.


Signed (Signature on file)

John McMahon