
<PAGE>


                                                                     Exhibit 5.1



            [Letterhead of Skadden, Arps, Slate, Meagher & Flom, LLP]

                                                     June 7, 2001




Alamosa (Delaware), Inc.
5225 S. Loop 289
Lubbock, Texas  79424


     Re: Alamosa (Delaware), Inc.
         12-1/2% Senior Notes due 2011
         Registration Statement on Form S-4
         ----------------------------------

Ladies and Gentlemen:

     We have acted as special counsel to Alamosa (Delaware), Inc., a Delaware
corporation (the "Company"), the Delaware Guarantors (as defined below), and the
Non-Delaware Guarantors (as defined below, and with the Delaware Guarantors,
collectively, the "Guarantors"), in connection with the public offering of up to
(i) $250,000,000 aggregate principal amount of 12-1/2% Senior Notes due 2011
(collectively, the "Notes") of the Company which are to be guaranteed on an
unsecured senior basis pursuant to guarantees (the "Guarantees") by certain
guarantors, including each of the guarantors listed on Schedule A (the "Delaware
Guarantors") and Schedule B (the "Non-Delaware Guarantors") attached hereto. The
Notes are to be issued pursuant to an exchange offer (the "Exchange Offer") in
exchange for a like principal amount of the Company's issued and outstanding
12-1/2% Senior Notes (collectively, the "Outstanding Notes") under the
Indenture, dated as of January 31, 2001, by and among the Company, the
Guarantors, and Wells Fargo Bank Minnesota, N.A., as trustee (the "Trustee"), as
supplemented by a First Supplemental Indenture, dated as of February 14, 2001
and a Second Supplemental Indenture, dated as of March 30, 2001 (together, the
"Indenture").


<PAGE>


June 7, 2001
Page 2


     This opinion is being furnished in accordance with the requirements of Item
601(b)(5) of Regulation S-K under the Securities Act of 1933, as amended (the
"Securities Act").

     In connection with this opinion, we have examined originals or copies,
certified or otherwise identified to our satisfaction, of (i) the Registration
Statement on Form S-4 (File No. 333-60572) relating to the Exchange Offer, as
filed with the Securities and Exchange Commission (the "Commission") under the
Securities Act on June 8, 2001 ("Registration Statement"); (ii) an executed copy
of the Registration Rights Agreement, dated January 24, 2001 by and among the
Company, the Guarantors parties thereto, Salomon Smith Barney Inc., TD
Securities (USA) Inc., Credit Suisse First Boston Corporation, First Union
Securities, Inc., Lehman Brothers Inc. and Scotia Capital (USA) Inc. (the
"Registration Rights Agreement"); (iii) an executed copy of the Indenture, which
includes therein the Guarantees; (iv) the Restated Certificate of Incorporation
of the Company; (v) the Amended and Restated Bylaws of the Company; (vi) certain
resolutions adopted by the Board of Directors of the Company, relating to, among
other things, the Exchange Offer, the issuance of the Outstanding Notes, the
Indenture and related matters; (vii) certain resolutions adopted by the Manager
of each of the Guarantors relating to, among other things, the issuance of the
Guarantees by the Guarantors; (viii) the Form T-1 of the Trustee attached as
Exhibit 25.1 to the Registration Statement; and (ix) the form of the Notes. We
have also examined originals or copies, certified or otherwise identified to our
satisfaction, of such records of the Company and the Guarantors and such
agreements, certificates of public officials, certificates of officers or other
representatives of the Company, the Guarantors and others, and such other
documents, certificates and records as we have deemed necessary or appropriate
as a basis for the opinions set forth herein.

     In our examination, we have assumed the legal capacity of all natural
persons, the genuineness of all signatures, the authenticity of all documents
submitted to us as originals, the conformity to original documents of all
documents submitted to us as certified, facsimile, conformed or photostatic
copies and the authenticity of the originals of such latter documents. In making
our examination of documents executed or to be executed, we have assumed that
the parties thereto, other than the Company and the Delaware Guarantors, had or
will have the power, corporate or other, to enter into and perform all
obligations thereunder, have been duly organized and are validly existing under
the laws of the jurisdiction of their organization, and




<PAGE>


June 7, 2001
Page 3

have also assumed the due authorization by all requisite action, corporate or
other, and execution and delivery by such parties of such documents and the
validity and binding effect of such documents on such parties. We have also
assumed that the Non-Delaware Guarantors have complied with all aspects of the
laws of their respective jurisdictions of organization in connection with the
Indenture and the issuance of the Outstanding Notes and the Notes. As to any
facts material to the opinions expressed herein which we have not independently
established or verified, we have relied upon the statements and representations
of officers and other representatives of the Company, the Guarantors and others.

     Our opinions set forth herein are limited to the General Corporation Law of
the State of Delaware and the laws of the State of New York which are normally
applicable to transactions of the type contemplated by the Exchange Offer, and
to the extent that judicial or regulatory orders or decrees or consents,
approvals, licenses, authorizations, validations, filings, recordings or
registrations with governmental authorities are relevant, to those required
under such laws (all of the foregoing being referred to as "Opined on Law"). We
do not express any opinion with respect to the law of any jurisdiction other
than Opined on Law or as to the effect of any such non-Opined on Law on the
opinions herein stated.

     Based upon and subject to the foregoing and the limitations,
qualifications, exceptions and assumptions set forth herein, we are of the
opinion that when (i) the Registration Statement becomes effective under the
Securities Act and the Indenture has been qualified under the Trust Indenture
Act of 1939, as amended, and (ii) the Notes (in the form examined by us) have
been duly executed and authenticated in accordance with the terms of the
Indenture and have been delivered upon consummation of the Exchange Offer
against receipt of Outstanding Notes surrendered in exchange therefor in
accordance with the terms of the Outstanding Notes, the Registration Rights
Agreement and the Indenture, the Notes will be valid and binding obligations of
the Company, entitled to the benefits of the Indenture and enforceable against
the Company in accordance with their terms, and each Guarantee will be the valid
and binding obligation of the respective Guarantor, entitled to the benefits of
the Indenture and enforceable against such Guarantor in accordance with its
terms, except, in each case, to the extent that (A) the enforcement thereof may
be limited by (1) bankruptcy, insolvency, reorganization, moratorium, fraudulent
conveyance or similar laws now or hereafter in effect relating to creditors'
rights

<PAGE>


June 7, 2001
Page 4

generally and (2) general principles of equity (regardless of whether
enforceability is considered in a proceeding at law or in equity).

     In rendering the opinions set forth above, we have assumed that (i) the
execution and delivery by the Company of the Indenture and the Notes and the
performance by the Company of its obligations thereunder and (ii) the execution
and delivery by each of the Guarantors of the Indenture and the performance by
each of the Guarantors of their obligations thereunder do not and will not
violate, conflict with or constitute a default under any agreement or instrument
to which the Company or any Guarantor or any of their respective properties is
subject, except for those agreements and instruments which have been identified
to us by the Company or any Guarantor as being material to it and which are
listed as exhibits to the Registration Statement.

     We hereby consent to the filing of this opinion with the Commission as an
exhibit to the Registration Statement. We also consent to the reference to this
firm under the caption "Legal Matters" in the Registration Statement. In giving
this consent, we do not thereby admit that we are included in the category of
persons whose consent is required under Section 7 of the Securities Act or the
rules and regulations of the Commission.

                           Very truly yours,

                           /s/  Skadden, Arps, Slate, Meagher & Flom, LLP





<PAGE>

<TABLE>
<CAPTION>

                                   SCHEDULE A
                                   ----------

                          TABLE OF DELAWARE GUARANTORS


                                           STATE OR OTHER      PRIMARY STANDARD
                                           JURISDICTION OF       INDUSTRIAL        I.R.S. EMPLOYER
       EXACT NAME OF                       INCORPORATION       CLASSIFICATION       IDENTIFICATION
     DELAWARE GUARANTOR                    OR FORMATION          CODE NUMBER            NUMBER
     ------------------                    ------------        ----------------    ---------------
<S>                                           <C>                  <C>                 <C>
Alamosa Holdings, LLC*                        Delaware             4812                75-2900875

Alamosa PCS, Inc.*                            Delaware             4812                74-2938804

Washington Oregon Wireless Properties, LLC*   Delaware             4812                93-1311633

Washington Oregon Wireless Licenses, LLC*     Delaware             4812                93-1311636

Southwest PCS Properties, LLC*                Delaware             4812                52-2303150

Southwest PCS Licenses, LLC*                  Delaware             4812                52-2303152

Alamosa Finance, LLC*                         Delaware             4812                74-2938804

Alamosa Limited, LLC                          Delaware             4812                74-2938804
     200 West Ninth Street Plaza
     Suite 102
     Wilmington, Delaware 19801

Alamosa Delaware GP, LLC*                     Delaware             4812                74-2938804
</TABLE>

-------------------
* Address and telephone of principal executive offices are the same as those of
  Alamosa (Delaware), Inc.

                                      A-1

<PAGE>

<TABLE>
<CAPTION>
                                   SCHEDULE B
                                   ----------

                        TABLE OF NON-DELAWARE GUARANTORS


                                         STATE OR OTHER   PRIMARY STANDARD
                                         JURISDICTION OF     INDUSTRIAL      I.R.S. EMPLOYER
          EXACT NAME OF                  INCORPORATION     CLASSIFICATION    IDENTIFICATION
      NON-DELAWARE GUARANTOR             OR FORMATION        CODE NUMBER         NUMBER
      ----------------------             --------------   ----------------   ---------------
<S>                                        <C>                  <C>            <C>
Alamosa Missouri, LLC*                     Missouri             4812           43-1827437

Alamosa Missouri Properties, LLC*          Missouri             4812           43-1860773

Washington Oregon Wireless, LLC*           Oregon               4812           93-1249029

SWLP, L.L.C.*                              Oklahoma             4812           75-2900875

SWGP, L.L.C.*                              Oklahoma             4812           75-2900875

Southwest PCS, L.P.*                       Oklahoma             4812           73-1545917

Alamosa Wisconsin GP, LLC*                 Wisconsin            4812           74-2938804

Alamosa Wisconsin Limited Partnership*     Wisconsin            4812           74-2938839

Alamosa (Wisconsin) Properties, LLC*       Wisconsin            4812           74-2938839

Texas Telecommunications, LP*              Texas                4812           75-2851320

Alamosa Properties, LP*                    Texas                4812           75-2921304
</TABLE>

-------------------
* Address and telephone of principal executive offices are the same as those of
  Alamosa (Delaware), Inc.


                                      A-2


