During the first half of 2017, some definitions demanded by the sector began to appear, with refarming and direct allocation of frequencies. Resolutions 1033 and 1034 reconfigured the map by assigning the Advanced Mobile Communications Service (SCMA) to the bands between 905 and 915 MHz, 950 and 960 MHz and 2500 and 2690 MHz. Resolution 3687 determined how the batches of the last band and the 5478 assigned to Telefónica the frequencies included in Lot A, América Móvil Lot B and Telecom Personal Lot C