Came across this wonderful (or should I say rather revolutionary) travel data SIM while transiting through Singapore on my way to Japan. The lady behind UOB counter mentioned that it's a new data plan by StarHub.
Basically for $32 you get 2GB per day at 4G speed and valid in
18 17 countries (current Happy Roam countries) for 15 days.
It's absolute treat for travellers to the included countries and transiting via Singapore. SIMs can be purchased at UOB money exchange outlets in transit area.
There is a similar $18 option available as well for those visiting upto 5 days.
Have a good one..!!
(P.S. Apologies for less descriptive post as I'm typing this on my phone while heading towards my boarding gate to catch the next leg of my journey)