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OPERATION, MAINTENANCE AND TELECOMMUNICATION SERVICE EXPENSES (Tables) | 12 Months Ended
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Dec. 31, 2019
OPERATION, MAINTENANCE AND TELECOMMUNICATION SERVICE EXPENSES |
Summary of operational maintenance and telecommunication service expenses |
|  | 2017 |  | 2018 |  | 2019
Operation and maintenance |  | 19,929 |  | 25,215 |  | 20,153
Radio frequency usage charges (Notes 34c.i, 34c.ii) |  | 4,276 |  | 5,473 |  | 5,736
Leased lines and CPE |  | 5,255 |  | 5,125 |  | 4,709
Concession fees and USO charges |  | 2,249 |  | 2,297 |  | 2,370
Cost of sales of handset (Note 8) |  | 1,544 |  | 1,860 |  | 1,109
Electricity, gas, and water |  | 1,037 |  | 1,051 |  | 1,102
Cost of SIM cards and vouchers (Note 8) |  | 914 |  | 866 |  | 645
Vehicles rental and supporting facilities |  | 301 |  | 413 |  | 386
Tower leases |  | 472 |  | 480 |  | 264
Insurance |  | 294 |  | 193 |  | 246
Others |  | 332 |  | 920 |  | 733
Total |  | 36,603 |  | 43,893 |  | 37,453

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