In order to further enhance telecommunication services quality, CTM will conduct the following upgrade projects in July 2023:



Project Title

Affected service



From 01:00 to 05:00 on 15th July



Mobile Network System upgrade and maintenance


During the period, some CTM mobile customers may experience intermittent interruption when using VoLTE service, whereas other services will remain normal.

For enquiries, please contact CTM No 1 Hotline: 1000.

Thank you for your kind attention. We apologize for any inconvenience this may cause.