Our team rode on the new TEL 3 line spanning from Stevens to Gardens by the Bay. To our surprise, the TEL 3 stations and the tunnels have full 4G+ Band 40 coverage. Speeds are decent with 2CA, running close to 120 Mbps in most instances (on the move).
The greatest surprise in that we notice 5G NSA was enabled from Great World to Napier stations at the station and tunnels. Although speedtest is able to detect and run, the maximum we can reach is around 190 Mbps on the POCO M4 Pro 5G. nPerf doesn’t seem to be able to detect it as 5G NSA signal.
A check on Phone info shows that DCNR is enabled and 5G NSA is online.