FYI, the air link latency for LTE was given as 4-5 ms. FDD as it's the best here. The 5G improvement to 1ms would require features (URLLC) that nobody implemented and nobody will: too expensive for too niche markets.
The latency in a cellular network is mostly from the core network, not the radio link anymore. Event in 4G.
(telecom engineer, having worked on both 4G and 5G and recently out of the field)
