What is Dl_freq?

In case of FDD (Frequency Division Duplex) LTE downlink channel (DL, eNB transmits UEs receive) and uplink channel (UL, UEs transmit eNB receives) are transmitted simultaneously on different frequencies. Also each band is marked by LTE release number where it was defined.

4G LTE offers fast download speeds, up to 50% faster speeds than 3G.

In many countries, n40 (2300 MHz), or commonly referred to as the 2.3 GHz 5G band , is a commonly tested and deployed frequency. The n40 band’s popularity is due to its relatively common availability, often already widely in use by 3G and 4G networks.