CSL System Maintenance and Schedule
3G & 4G Services will be affected during 02:00-04:00, actual outage time less than 15 mins
| Date | Affected Area |
| 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 |
| 20-Nov-2025 | Southern, KwaiTsing |
| 25-Nov-2025 | KwunTong, Shatin |