CSL System Maintenance and Schedule
4G Services will be affected during 02:00-04:00, actual outage time less than 15 mins
| Date | Affected Area |
| 27-Aug-2025 | Tuen Mun, Yuen Long, Northern |
| 2-Sep-2025 | Sai Kung, Tai Po, Shatin |
| 4-Sep-2025 | Kwai Tsing, Tsuen Wan, Islands |
| 9-Sep-2025 | Yau Tsim, Mong Kok, Shan Shui Po |
| 11-Sep-2025 | Kowloon City, Wong Tai Sin, Kwun Tong |
| 16-Sep-2025 | Central, Western, Wanchai, Causeway Bay |
| 18-Sep-2025 | MTR, Eastern, South |
3G & 4G Services will be affected during 02:00-04:00, actual outage time less than 15 mins
| Date | Affected Area |
| 9-Sep-2025 | HK island North, New Territories North, TuenMun, YuenLong, TsuenWan North, Taipo and Shatin |
| 11-Sep-2025 | ShamShuiPo |
| 18-Sep-2025 | TuenMun, KowloonCity |
| 23-Sep-2025 | Southern, KwaiTsing |
| 25-Sep-2025 | KwunTong, Shatin |
| 30-Sep-2025 | MTR, Northern |
| 9-Oct-2025 | MTR, Island, Southern |
| 14-Oct-2025 | SaiKung, ShaTin |
| 16-Oct-2025 | Central West, TaiPo, WongTaiSin |
| 21-Oct-2025 | KowloonCity, MongKok |
| 23-Oct-2025 | KwaiTsing, YauTsim |
| 28-Oct-2025 | Central West, Eastern |
| 4-Nov-2025 | TsuenWan, WanChai |
| 13-Nov-2025 | Island, YuenLong |
| 18-Nov-2025 | KwunTong, ShamShuiPo |