I got this directly in my Inbox. Singtel, one of the major operators in Singapore informs that Lumia 900 running Windows Phone 7.5 Tango is available from 26th May, 7am. This is great news considering the fact that it is still not confirmed to be available in many major markets like UK due to high demand in USA market (Read AT&T). Also Tango means Tethering / Internet sharing is enabled out of box.
There are many plans to choose from. They are also giving away Micro SIM adapters as a promotional free gift.
Check the link below for more.