23. SEGMENT INFORMATION The Company uses operating segment information for decision-making. The Company identified only one operating segment that corresponds to the telecommunications business in Brazil. In addition to the telecommunications business in Brazil, the Company conducts other businesses that individually or in aggregate do not meet any of the quantitative indicators that would require their disclosure as reportable business segments. These businesses refer basically to the following companies: Companhia Santomense de Telecomunicacoes, Listas Telefonicas de Mocambique, ELTA  Empresa de Listas Telefonicas de Angola, and Timor Telecom, which provide fixed and mobile telecommunications services and publish telephone directories, and which have been consolidated since May 2014. The revenue generation is assessed by the Company based on a view segmented by customer, into the following categories:  Residential Services, focused on the sale of fixed telephony services, including voice services, data communication services (broadband), and pay TV;  Personal Mobility, focused on the sale of mobile telephony services to subscription and prepaid customers, and mobile broadband customers; and  SMEs/Corporate, which includes corporate solutions offered to small, medium-sized, and large corporate customers. No single customer represent more than 10% of revenues neither 10% of receivables, Telecommunications in Brazil In preparing the financial statements for this reportable segment, the transactions between the companies included in the segment have been eliminated. The financial information of this reportable segment for the years ended December 31, 2017, 2016 and 2015 is as follows: 2017 2016 2015 Residential 9,170,835 9,376,266 9,779,218 Personal mobility 7,644,515 7,848,610 8,430,890 SMEs/Corporate 6,485,898 7,606,598 7,973,893 Other services and businesses 255,692 332,078 257,090 Net operating revenue 23,556,940 25,163,552 26,441,091 Operating expenses Depreciation and amortization (5,803,487 ) (6,128,402 ) (5,996,157 ) Interconnection (771,212 ) (1,141,786 ) (1,757,277 ) Personnel (2,749,038 ) (2,750,323 ) (2,618,139 ) Third-party services (6,149,189 ) (6,243,623 ) (6,154,900 ) Network maintenance services (1,235,760 ) (1,501,701 ) (1,860,646 ) Handset and other costs (214,102 ) (252,265 ) (226,826 ) Advertising and publicity (410,495 ) (427,463 ) (379,537 ) Rentals and Insurance (4,152,521 ) (4,284,672 ) (3,553,881 ) Provisions/reversals (143,517 ) (1,056,436 ) (1,836,380 ) Allowance for doubtful accounts (740,575 ) (622,527 ) (692,935 ) Impairment losses (225,512 ) (501,465 ) Taxes and other expenses (277,372 ) (399,123 ) (961,957 ) Other operating income, net (1,234,477 ) (132,211 ) Reorganization items, net (2,371,919 ) (9,005,998 ) OPERATING INCOME BEFORE FINANCIAL INCOME (EXPENSES) AND TAXES (2,696,724 ) (9,008,490 ) (99,009 ) FINANCIAL INCOME (EXPENSES) Financial income 1,331,699 944,611 4,493,042 Financial expenses (2,075,430 ) (4,539,997 ) (11,420,837 ) PRETAX INCOME (3,440,455 ) (12,603,876 ) (7,026,804 ) Income tax and social contribution (1,498,216 ) (87,379 ) (3,202,817 ) LOSS FROM CONTINUING OPERATIONS (4,938,671 ) (12,691,255 ) (10,229,621 ) Reconciliation of revenue and income (loss) and information per geographic market In the years ended December 31, 2017, 2016 and 2015, the reconciliation of the revenue of the segment Telecommunications in Brazil and total consolidated revenue is as follows: 2017 2016 2015 Net operating revenue Revenue related to the reportable segment 23,556,940 25,163,552 26,441,091 Revenue related to other businesses 232,714 832,871 912,674 Consolidated net operating revenue 23,789,654 25,996,423 27,353,765 In the years ended December 31, 2017, 2016 and 2015, the reconciliation between the profit (loss) before taxes of the segment telecommunications in Brazil and the consolidated profit (loss) before taxes is as follows: 2017 2016 2015 Profit (loss) before taxes Telecommunications in Brazil (3,440,455 ) (12,603,876 ) (7,026,804 ) Other businesses (938,193 ) (830,752 ) 479,688 Consolidated income before taxes (4,378,648 ) (13,434,628 ) (6,547,116 ) Total assets, liabilities and property, plant and equipment and intangible assets per geographic market at December 31, 2017 and 2016 are as follows: 2017 Total assets Total liabilities Property, plant and equipment assets Intangible assets Capital expenditures on property, plant and equipment and intangible assets Brazil 66,311,553 80,316,703 26,934,278 9,206,776 4,258,545 Other, primarily Africa 4,675,216 354,127 149,176 48,063 57,947 2016 Total assets Total liabilities Property, plant and equipment assets Intangible assets Capital expenditures on property, plant and equipment and intangible assets Brazil 68,642,952 78,851,283 25,696,473 10,353,896 3,120,854 Other, primarily Africa 5,403,903 544,865 383,359 157,163 142,717 No single customer accounts for more than 10% of consolidated revenue.