EDIT (20/6/16): Multiple other options exist to get Giffgaff SIMs for free apart from the one I mentioned in this article
https://www.facebook.com/Giffgaff-in-Singapore-570433863009162/
http://sgfree-giffgaff.blogspot.sg/
giffgaff.singapore@gmail.com
freeggsims@gmail.com
The problem with sim cards is that the time you need them the most is the time you can't get them yet. Like when you first...