Singtel, Star Hub, M1 have SMP in this sector. Singtel controls 43% of the fixed-line market and 50% of the mobile market in Singapore. The majority stake of Singtel (51%) is owned by Temasek Holdings, a State-owned investment company. See also Singtel's Factsheet Q1 FY2021, https://www.singtel.com/content/dam/singtel/investorRelations/factsheetsAndPresentation/2020/Q1FY21_Factsheet_Final.pdf 