n105 (600 MHz)

Known as "APT 600", this is an FDDFDD: A communication technology that uses separate frequency bands for transmitting and receiving operations. This technique enables simultaneous bi-directional communication by allocating one frequency band for upstream (transmission from the user equipment to the base station) and another distinct… band employing reversed duplexing. With uplink frequencies from 663 to 703 MHz and downlink frequencies from 612 to 652 MHz, it was primarily designed for the Asia-Pacific region. The Indian telecom sector has shown particular interest in this band. The reversed duplexing approach provides a significant advantage, whereby placing the uplink band adjacent to band n28, interference at the 703 MHz boundary can be minimised and the two can coexist on the same infrastructure. The n105 band was standardised in 3GPP Release 18.0 in January 2023.