SINGAPORE - M1 has been fined $1.5 million by the Infocomm Development Authority of Singapore (IDA) for a three-day service disruption in January that affected some 250,000 customers.
The Straits Times reported that this is the highest fine ever incurred by a telco.
The IDA said in a statement that M1 "had not fulfilled its obligation to provide resilient mobile telephone services".
From January 15 to January 18, the mobile operator's 3G services in the south-western parts of Singapore (West Coast, Jurong and Tuas) and 2G mobile services in the north-western parts of Singapore (Woodlands, Yishun and Kranji) were affected.
The 3G service disruption lasted 63 hours and 15 minutes, while the 2G services were disrupted for 71 hours and 15 minutes.
The outage was caused by a power trip at one of M1's network operation centres during the course of upgrading works.
In its assessment, the IDA found that the telco had not carried out adequate risk assessment on the upgrading works. The regulator also noted that it did not have sufficiently rigorous control and supervision of the upgrading process.