Well, as the adoption of 5G is increased, 5G internet speeds has been significantly dropped on a heavily congested area (outside Paradigm Mall in JB) - until such a point that using 4G is faster. I remember last time (around the same time last year), 5G at the same area has 200Mbps speed.

5G speeds can be less than 10Mbps because of severe congestion.

More networks and/or cells are needed to reduce the network load, especially when DNB guarantees at least 100Mbps speed.