n39 (1900 MHz)

Known as the "TD 1900+" band, the n39 band is a Time Division Duplexing (TDDTDD: A wireless communication technique that uses a single frequency band for both transmitting and receiving operations but separates these operations in time. In a TDD system, upstream (transmission from user equipment to base station) and downstream (transmission from base station to user equipment)…) band operating around the 1900 MHz spectrum for 5G NR5G NR: 5G was developed with three broad use case families in mind: enhanced mobile broadband (eMBB), massive machine-type communications (mMTC) and ultra-reliable low-latency communications (URLLC). eMBB focuses on across-the-board enhancements to the data rate, latency, user density, capacity and… networks. It's particularly used in China, where TDD bands have seen significant adoption due to the efficient utilisation of spectrum they allow. The "+" signifies it as an extension to the original 1900 MHz PCS band, providing additional capacity for high-demand areas.