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






Project Title


Affected service



From 0:00 to 06:00 on 29th July



Mobile Network System upgrade and maintenance



During the period, some CTM mobile customers may experience intermittent interruption when using VoLTE, Mobile data 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.