If you’re using StarHub 5G or its sub-brand Eight’s 5G, you were most likely connected to the n78 band previously. A few months ago, they introduced the n1 band, which is shared on Antina to provide a bandwidth boost through carrier aggregation. This increased the total spectrum for their 5G SA network to 125 MHz.
Recently, they appear to have added their own n28 band to improve coverage. This 10 MHz n28 band (not shared on Antina) now forms a three-band 5G SA setup with n78 and n1, delivering wider coverage, and high speed.
With the addition of n28, the total bandwidth of their 5G SA network has increased to 135 MHz.
Personally, i did observe the addition of the new band n28 added into the mix when i access it though my 5G Router. It shows that combination and the bandwidth allocated to it.
A run of speedtest gave me a download speed of 371 mbps and 31 mbps uplink. This is respectable with a ping time of 9 ms. Although the speed falls short of the usual 500 Mbps to 600 Mbps when connected to just the n78+n1 band, the inclusion of n28 allows it to penetrate walls and gave 5G access to people beneath basement carparks or even in the lifts.
With that bandwidth, it will be able to handle more users connected to the base station that offers the bands. Although bandwidth is adequate, it is also dependent on the date and time, the number of connections to the station. Everyone might encounter a difference experience when using the 5G SA network.