There have been quite a few outages in the last few years, so the following info may come in handy.
Call their hotlines (which you likely to get through when there is a outage):
- Singtel: 1688, http://info.singtel.com/faq-contact-us
- M1: 1627, http://web1.m1.com.sg/M1/myaccount/hotlines/index.html
- Starhub: 1633, 6873 2828, http://www.starhub.com/personal/support/contact-us.html
Check their corporate Facebook pages (M1 has failed me in a few occasions):
- https://www.facebook.com/singtel, https://twitter.com/SingTel
- https://www.facebook.com/StarHub, https://twitter.com/StarHub
The independent websites that respond fast in the past are:
Disagreed? Let me know.