Be aware of scammers impersonating as IMDA officers and report any suspicious calls to the police. Please note that IMDA officers will never call you nor request for your personal information. For scam-related advice, please call the Anti-Scam helpline at 1800-722-6688 or go to www.scamalert.sg.

4G Measurement Survey Results for April to June 2018

4G Mobile Service Coverage for April to June 2018

In-Building Service Coverage

The indicator measures in-building service coverage for the 4G cellular mobile network. In-building service coverage measures the percentage of data points collected in a building from a 4G cellular mobile network that achieves a minimum signal strength of at least -109dBm. Service coverage is measured at randomly selected buildings and at publicly accessible areas within the tested buildings as a proxy for the coverage in the entire building to avoid disturbing residents. In order to better reflect end users' experience, IMDA uses mobile phones to collect the signal strength data points.

M1 Singtel Mobile StarHub Mobile
IMDA’s Performance Survey Period - Q2 (April to June) 2018
No. of Buildings with 4G Service Coverage of >85% at a Signal Strength of -109dBm or better/ No. of Buildings Tested
54/60 60/60 56/60

Note: The same sixty buildings were tested across the three mobile operators. The performance of each of the mobile operator varies for each of the building tested. End users' individual experience may differ due to different models of handset used, handset settings, number of users in the vicinity, etc.

Tunnel Service Coverage

This indicator measures the service coverage for the 4G cellular mobile network within road and MRT tunnels. Tunnel service coverage measures the percentage of data points collected in a tunnel from a 4G cellular mobile network that achieves a minimum signal strength of at least -109dBm. The tunnel areas surveyed by IMDA include all road and MRT tunnels in Singapore. In order to better reflect end users' experience, IMDA uses mobile phones to collect the signal strength data points.

IMDA’s Performance Survey Period - Q2 (April to June) 2018 M1 Singtel Mobile StarHub Mobile
Road Tunnels
Central Expressway 100% 99.31% 100%
Fort Canning 100% 94.49% 100%
Kallang-Paya Lebar Expressway 100% 99.85% 99.49%
Marina Coastal Expressway 100% 100% 100%
Woodsville 100% 100% 100%
MRT Tunnels
Changi Airport Line 90.21% 95.43% 83.89%
Circle Line 100% 99.98% 99.90%
Downtown Line 99.36% 99.81% 99.41%
East-West Line 99.64% 100% 99.98%
North East Line 99.97% 99.97% 99.92%
North-South Line 99.93% 100% 99.95%

Note 1: For road and/or MRT tunnels without a published result, it means that the respective mobile operator has not completed its 4G service deployment at the particular road and/or MRT tunnel.

Note 2: 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.


LAST UPDATED: 26 OCT 2022