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Exhibit 4.12 THE USE OF THE FOLLOWING NOTATION IN THIS EXHIBIT INDICATES THAT A CONFIDENTIAL PORTION HAS BEEN OMITTED PURSUANT TO A REQUEST FOR CONFIDENTIAL TREATMENT AND THE OMITTED MATERIAL HAS BEEN FILEDPARATELY WITH THE COMMISSION: [***]. ADDENDUM TO THE COMMITMENT LETTERFOR PROVISION OF INTERNET SERVICES 01 - ISSUING BODY
     02 - ADDENDUM NO.VES-10
     3203 - DATE OF EXECUTION OF CONTRACT
     04 - ISSUING BODY
     05 - REFERENCE DOCUMENT26/06/2003
     VES-9
     COMMITMENT LETTER06 - CLIENT (CORPORATE NAME/NAME)
     
     07  Corporate/Individual Taxpayers ID (CNPJ/CPF)NET SERVIÇOS DE COMUNICAÇÃO S/A
     00.108.784/0001-6508 - ADDRESS
     
     09 - CITY
     10 - STATERUA VERBO DIVINO, 1356
     SÃO PAULO
     SP
  By the present Instrument, Empresa Brasileira de Telecomunicações S.A.  EMBRATELand the above-mentioned CUSTOMER, hereby agree to enter into this Addendum to the Commitment Letter for the Provision of Business Link Service, pursuant to the following conditions: 1 CLAUSE ONE - PURPOSE The PURPOSEof this ADDENDUMis: 1.1To update the IP capacities and their respective bandwidths, per the following table: ITEM
     CNL
     LOCATION
     BANDWITH01
     ANS
     ANÁPOLIS
     [***]02
     APS
     ARAPONGAS
     [***]03
     BGE
     BAGÉ
     [***]04
     BGV
     BENTO GONÇALVES
     [***]05
     BHE
     BELO HORIZONTE
     [***]06
     BNU
     BLUMENAU
     [***]07
     BRU
     BAURU
     [***]08
     BSA
     BRASILIA
     [***]09
     CAS
     CAMPINAS
     [***]10
     CCO
     CHAPECÓ
     [***]11
     CPE
     CAMPO GRANDE
     [***]12
     CSL
     CAXIAS DO SUL
     [***]13
     CTA
     CURITIBA
     [***]14
     CUA
     CRICIÚMA
     [***]15
     CZA
     CRUZ ALTA
     [***]16
     ERE
     ERECHIM
     [***]17
     FAC
     FRANCA
     [***]18
     FNS
     FLORIANÓPOLIS
     [***]19
     FRL
     FARROUPILHA
     [***]20
     GNA
     GOIÂNIA
     [***]21
     IDU
     INDAIATUBA
     [***]22
     JAI
     JUNDIAI
     [***]23
     JVE
     JOINVILLE
     [***]24
     KDK
     CAPÃO DA CANOA
     [***]25
     LDA
     LONDRINA
     [***]26
     LJO
     LAJEADO
     [***]27
     MGA
     MARINGÁ
     [***]28
     NHO
     NOVO HAMBURGO
     [***]29
     PAA
     PIRACICABA
     [***]30
     PAE
     PORTO ALEGRE
     [***]31
     PAS
     PASSO FUNDO
     [***]


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Exhibit 4.12 THE USE OF THE FOLLOWING NOTATION IN THIS EXHIBIT INDICATES THAT A CONFIDENTIAL PORTION HAS BEEN OMITTED PURSUANT TO A REQUEST FOR CONFIDENTIAL TREATMENT AND THE OMITTED MATERIAL HAS BEEN FILEDPARATELY WITH THE COMMISSION: [***]. ITEM
     CNL
     LOCATION
     BANDWITH32
     PLT
     PELOTAS
     [***]33
     RGR
     RIO GRANDE
     [***]34
     RJO
     RIO DE JANEIRO
     [***]35
     RPO
     RIBEIRÃO PRETO
     [***]36
     SCL
     SÃO CARLOS
     [***]37
     SCR
     SANTA CRUZ DO SUL
     [***]38
     SMA
     SANTA MARIA
     [***]39
     SOC
     SOROCABA
     [***]40
     SPO
     SAO PAULO
     [***]41
     SRR
     SÃO JOSÉ DO RIO PRETO
     [***]42
     STS
     SANTOS
     [***]43
     UGN
     URUGUAIANA
     [***]44
     GRS
     GUARULHOS
     [***]45
     BTU
     BOTUCATU
     [***]46
     JAU
     JAU
     [***]47
     STZ
     SERTÃOZINHO
     [***]48
     VOS
     VALINHOS
     [***]49
     PG0
     PONTA GROSSA
     [***]50
     MIA
     MARILIA
     [***]51
     CSC
     CASCAVEL
     [***]52
     GRP
     GUARAPUAVA
     [***]53
     CNE
     CIANORTE
     [***]
  2 CLAUSE TWO - RATIFICATION 2.1 This ADDENDUMshall take force in full from the date of its execution, therefore, all the other clauses and conditions of the Original Commitment Letter and prior addenda, whenever they do not state the contrary of this INSTRUMENTshall remain in force. In witness whereof, the parties execute this ADDENDUMin two counterparts in the presence of the undersigned witnesses: São Paulo, November 17, 2009 EMPRESA BRASILEIRA DE TELECOMUNICAÇÕES S/A
     
     NET SERVIÇOS DE COMUNICAÇÃO S/AEMBRATEL/s/ Cid Kuhara
     
     /s/ João ElekCID KUHARA
     
     João ElekSALES OFFICER
     Chief Financial OfficerEMPRESA BRASILEIRA DE TELECOMUNICAÇÕES S/A
     NET SERVIÇOS DE COMUNICAÇÃO S/AEMBRATEL/s/ Samuel Luis Cano Nunes
     
     /s/ José Paulo de FreitasSAMUEL LUIS CANO NUNES
     
     José Paulo de FreitasSALES MANAGER
     
     Chief Human Resources Officer/s/ Carlos RomeroNAME:
     
     Carlos RomeroRG:  / CPF:
     
     RG:28953414-8/ CPF: 176031278-9Witness
     
     Witness


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