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






Project Title


Affected service





02:00 am to 05:30 am,

22nd July 2023




Billing System upgrade and maintenance

Mobile prepaid and postpaid customers may experience intermittent interruption for service application and enquiry through IVRS system, USSD code access, prepaid card real name registration, e-SIM, CTM eService Portal, CTM Buddy and Wechat Official Account.


Mobile prepaid customers may experience intermittent interruption when using roaming Voice and IDD service.

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

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