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OTHER NON-CURRENT ASSETS | 12 Months Ended
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Dec. 31, 2017
OTHER NON-CURRENT ASSETS |
OTHER NON-CURRENT ASSETS | 11. OTHER NON-CURRENT ASSETS The breakdown of other non-current assets is as follows:
|  | 2016 |  | 2017
Prepaid other taxes - net of current portion (Note 28) |  | 2,164 |  | 3,075
Advances for purchases of property and equipment |  | 5,432 |  | 2,869
Prepaid rental - net of current portion (Note 8) |  | 2,471 |  | 2,688
Frequency license - net of current portion (Note 8) |  | 320 |  | 2,019
Prepaid income taxes - net of current portion (Note 28) |  | 492 |  | 763
Deferred charges |  | 387 |  | 413
Security deposit |  | 144 |  | 116
Others |  | 98 |  | 327
Total |  | 11,508 |  | 12,270
Prepaid rental covers rent of leased line, telecommunication equipment, land and building under lease agreements of the Group with remaining rental periods ranging from 1 to 40 years. As of December 31, 2016 and 2017, deferred charges represent deferred Indefeasible Right of Use (“IRU”) Agreement charges. Total amortization of deferred charges for the years ended December 31, 2015, 2016 and 2017 amounted to Rp46 billion, Rp40 billion and Rp46 billion, respectively. Refer to Note 31 for details of related party transactions.

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