M1, launched in 1997, is controlled by Keppel (83.9% effective stake). It runs its own 4G network and shares a 5G standalone radio network with StarHub, through a joint venture IMDA picked in 2020. Its fibre broadband runs on NetLink's national network. M1 serves over 2M customers.

Mobile network
- Network used
- M1
- Technologies
- 5G (standalone)4G
- Subscribers
- 2.29M· May 2026, per The Straits Times
- Coverage
- Singapore
M1's 5G, one of Singapore's two nationwide standalone 5G networks, was fully deployed by May 2026, its CEO said.

Fixed network
- Network used
- M1
- Technologies
- Fibre (FTTH)
- Coverage
- Singapore
M1 sells plans up to 10Gbps on NetLink's fibre, which covers homes in mainland Singapore and its connected islands.