Note: End users' individual experience may differ due to different models of handset used, handset settings, number of users in the vicinity, etc. The tunnel service coverage results are based on IMDA’s coverage performance surveys.
*M1 and Singtel Mobile had failed to meet the 4G QoS standard of >99% in the Downtown Line in Q3 2023. IMDA expects the mobile network operators to work closely with the relevant parties to rectify the failures and to meet the service quality standards in the tunnels.
