MDDI’s Response to PQ on Mobile Network Dead Zones across the MRT Network

Parliament Sitting on 6 March 2026

Question for Oral Reply

3. Mr Gerald Giam Yean Song: To ask the Minister for Digital Development and Information (a) whether the Infocomm Media Development Authority (IMDA) compiles a list of specific mobile network dead zones across the entire MRT network; (b) if so, whether this list and the rectification status of each site will be made public via a dashboard to ensure operator accountability; and (c) how many persistent signal gaps have remained unrectified for more than 12 months.

 Answer:

Mobile Network Operators (MNOs) are required to meet the Infocomm Media Development Authority’s (IMDA) 4G Quality of Service (QoS) standards, and IMDA conducts regular checks to ensure these are met. This includes the requirement to provide more than 99% mobile coverage in all MRT tunnels and MRT stations in Singapore. The QOS performance results for each MRT line are published on IMDA’s website.

Where there are coverage gaps found along the MRT network, IMDA works closely with MNOs to carry out enhancements that address the gaps. MNOs typically take 6 months to complete these enhancements, working within the limited hours of maintenance windows for tunnel access.