EXHIBIT 5 -- Opinion of Weed & Co. LLP WEED & CO. LLP 4695 MACARTHUR COURT, SUITE 1430, NEWPORT BEACH, CALIFORNIA 92660-2164 TELEPHONE (949) 475-9086 FACSIMILE (949) 475-9087 December 28, 2004 Board of Directors ERF Wireless, Inc. 2911 South Shore Boulevard, Suite 100 League City, Texas 77573 Re: Form S-8 Registration Statement; Opinion of Counsel Dear Members of the Board: You have requested our opinion with respect to certain matters in connection with ERF Wireless, Inc.'s (the "Company") filing of a registration statement on Form S-8 (the "Registration Statement") with the Securities and Exchange Commission covering the offering of an aggregate of 5,000,000 shares of the Company's common stock, $.001 par value (the "Shares"), pursuant to the 2004 Non-Qualified Stock Compensation Plan (the "Stock Plan"). In connection with this opinion, we have examined the Registration Statement and such other documents, records, certificates, memoranda and other instruments as we deemed necessary for the basis of this opinion. We have assumed the genuineness and authenticity of all documents submitted to us as originals and the conformity to originals of all documents submitted to us as copies and the due execution and delivery of all documents where due execution and delivery are a prerequisite to the effectiveness thereof. On the basis of the foregoing, and in reliance thereon, we are of the opinion that the Shares, when sold and issued in accordance with the Stock Plan, the Consulting Agreements and the Registration Statement and related prospectus, will be legally issued, fully paid and non-assessable. We consent to the use of our opinion as an exhibit to the Form S-8 Registration Statement and to the reference to this firm in any prospectus which is incorporated by reference into and made a part of the Registration Statement. Very truly yours, /s/ Weed & Co. LLP ------------------ Weed & Co. LLP