Exhibit 10.26

JOINDER AGREEMENT

TO REGISTRATION RIGHTS AGREEMENT

This Joinder Agreement (this “Joinder Agreement”) is made as of the date written below by the undersigned in accordance with Section 10(d) of the Registration Rights Agreement dated as of December 17, 2018 (as the same may be amended from time to time, the “Registration Rights Agreement”) among Oi S.A. – In Judicial Reorganization (the “Company”) and the Potential Shareholders party thereto. Capitalized terms used, but not defined, herein shall have the meaning ascribed to such terms in the Registration Rights Agreement.

The Potential Shareholder party hereto (the “Potential Shareholder”) is a signatory to the Registration Rights Agreement. The Potential Shareholder hereby (1) assigns the rights and obligations under the Registration Rights Agreement with respect to any Unsubscribed Shares that the Potential Shareholder is obligated to acquire under the Subscription Agreement and any Commitment Fee Shares that the Potential Shareholder is entitled to receive under the Subscription Agreement (and any Registrable Securities issued or issuable with respect thereto) to the Person or Persons (a) designated by the Potential Shareholder as obligated to acquire such Unsubscribed Shares or entitled to receive such Commitment Fee Shares, and (b) named as the “Joining Party” on the signature page hereto, or (2) assigns the rights and obligations under the Registration Rights Agreement with respect to the Registrable Securities that the Potential Shareholder has transferred or assigned to the Person or Persons named as the “Joining Party” on the signature page hereto.

Each Joining Party hereby acknowledges, agrees and confirms that, by its execution of this Joinder Agreement, as of the date hereof, the Joining Party shall be deemed to be a party to the Registration Rights’ Agreement and shall have all of the rights and obligations of a “Potential Shareholder” thereunder with respect to any Registrable Securities issued to it under the Subscription Agreement or transferred or assigned to it by the Potential Shareholder as if it had been an original party to the Registration Rights Agreement. The Joining Party hereby ratifies, as of the date hereof, and agrees to be bound by, all of the terms, provisions and conditions contained in the Registration Rights Agreement.

[Signature Page Follows.]

1

IN WITNESS WHEREOF, the undersigned has executed this Joinder Agreement as of the date written below.

		SOLUS ALTERNATIVE MANAGEMENT LP, as investment advisor on behalf of certain funds and accounts listed below
Date:	1/23/2019	By:	[illegible]
			Name: illegible Title: Authorized Signatory
			Sola Ltd Ultra Master Ltd Ultra NB LLC Solus Opportunities Fund 1 LP Solus Opportunities Fund 3 LP Solus Opportunities Fund 4 LP Solus Opportunities Fund 5 LP Solus Opportunities IDF Series Interests of the SALI Multi-Series Fund, L.P. Solus SPC Master Fund Ltd for and on behalf of Segregated Portfolio 2 Master

2

IN WITNESS WHEREOF, the undersigned has executed this Joinder Agreement as of the date written below.

		SOLA LTD
Date:	1-23-19	By:	[illegible]
			Name: illegible Title: Authorized Signatory
			c/o Solus Alternative Asset Management LP 410 Park Avenue New York, NY 10024 Email: notices@soluslp.com Name: Title: Number of Registrable Securities assigned or transferred: 32,516,799 With a copy to (which shall not constitute notice): Davis Polk & Wardwell LLP 450 Lexington Ave. New York, New York 10017
			Attention:	Timothy Graulich
				Stephen Salmon
			Email:	timothy.graulich@davispolk.com
				stephen.salmon@davispolk.com

3

		ULTRA MASTER LTD
Date:	1-23-19	By:	[illegible]
			Name: illegible Title: Authorized Signatory
			c/o Solus Alternative Asset Management LP 410 Park Avenue New York, NY 10024 Email: notices@soluslp.com Name: Title: Number of Registrable Securities assigned or transferred: 222,393 With a copy to (which shall not constitute notice): Davis Polk & Wardwell LLP 450 Lexington Ave. New York, New York 10017
			Attention:	Timothy Graulich
				Stephen Salmon
			Email:	timothy.graulich@davispolk.com
				stephen.salmon@davispolk.com

4

		ULTRA NB LLC
Date:	1-23-19	By:	[illegible]
			Name: illegible Title: Authorized Signatory
			c/o Solus Alternative Asset Management LP 410 Park Avenue New York, NY 10024 Email: notices@soluslp.com Name: Title: Number of Registrable Securities assigned or transferred: 951,371 With a copy to (which shall not constitute notice): Davis Polk & Wardwell LLP 450 Lexington Ave. New York, New York 10017
			Attention:	Timothy Graulich
				Stephen Salmon
			Email:	timothy.graulich@davispolk.com
				stephen.salmon@davispolk.com

5

		SOLUS OPPORTUNITIES FUND 1 LP
Date:	1-23-19	By:	[illegible]
			Name: illegible Title: Authorized Signatory
			c/o Solus Alternative Asset Management LP 410 Park Avenue New York, NY 10024 Email: notices@soluslp.com Name: Title: Number of Registrable Securities assigned or transferred: 2,126,183 With a copy to (which shall not constitute notice): Davis Polk & Wardwell LLP 450 Lexington Ave. New York, New York 10017
			Attention:	Timothy Graulich
				Stephen Salmon
			Email:	timothy.graulich@davispolk.com
				stephen.salmon@davispolk.com

6

		SOLUS OPPORTUNITIES FUND 3 LP
Date:	1-23-19	By:	[illegible]
			Name: illegible Title: Authorized Signatory
			c/o Solus Alternative Asset Management LP 410 Park Avenue New York, NY 10024 Email: notices@soluslp.com Name: Title: Number of Registrable Securities assigned or transferred: 2,669,979 With a copy to (which shall not constitute notice): Davis Polk & Wardwell LLP 450 Lexington Ave. New York, New York 10017
			Attention:	Timothy Graulich
				Stephen Salmon
			Email:	timothy.graulich@davispolk.com
				stephen.salmon@davispolk.com

7

		SOLUS OPPORTUNITIES FUND 4 LP
Date:	1-23-19	By:	[illegible]
			Name: illegible Title: Authorized Signatory
			c/o Solus Alternative Asset Management LP 410 Park Avenue New York, NY 10024 Email: notices@soluslp.com Name: Title: Number of Registrable Securities assigned or transferred: 6,514,885 With a copy to (which shall not constitute notice): Davis Polk & Wardwell LLP 450 Lexington Ave. New York, New York 10017
			Attention:	Timothy Graulich
				Stephen Salmon
			Email:	timothy.graulich@davispolk.com
				stephen.salmon@davispolk.com

8

		SOLUS OPPORTUNITIES FUND 5 LP
Date:	1-23-19	By:	[illegible]
			Name: illegible Title: Authorized Signatory
			c/o Solus Alternative Asset Management LP 410 Park Avenue New York, NY 10024 Email: notices@soluslp.com Name: Title: Number of Registrable Securities assigned or transferred: 5,723,113 With a copy to (which shall not constitute notice): Davis Polk & Wardwell LLP 450 Lexington Ave. New York, New York 10017
			Attention:	Timothy Graulich
				Stephen Salmon
			Email:	timothy.graulich@davispolk.com
				stephen.salmon@davispolk.com

9

		SOLUS OPPORTUNITIES IDF SERIES INTERESTS OF THE SALI MULTI-SERIES FUND, L.P.
Date:	1-23-19	By:	[illegible]
			Name: illegible Title: Authorized Signatory
			c/o Solus Alternative Asset Management LP 410 Park Avenue New York, NY 10024 Email: notices@soluslp.com Name: Title: Number of Registrable Securities assigned or transferred: 172,123 With a copy to (which shall not constitute notice): Davis Polk & Wardwell LLP 450 Lexington Ave. New York, New York 10017
			Attention:	Timothy Graulich
				Stephen Salmon
			Email:	timothy.graulich@davispolk.com
				stephen.salmon@davispolk.com

10

		SOLUS SPC MASTER FUND LTD FOR AND ON BEHALF OF SEGREGATED PORTFOLIO 2 MASTER
Date:	1-23-19	By:	[illegible]
			Name: illegible Title: Authorized Signatory
			c/o Solus Alternative Asset Management LP 410 Park Avenue New York, NY 10024 Email: notices@soluslp.com Name: Title: Number of Registrable Securities assigned or transferred: 478,028 With a copy to (which shall not constitute notice): Davis Polk & Wardwell LLP 450 Lexington Ave. New York, New York 10017
			Attention:	Timothy Graulich
				Stephen Salmon
			Email:	timothy.graulich@davispolk.com
				stephen.salmon@davispolk.com

11