Hope the good people here will bear with me as I figure this is where the people will be most knowledgeable about what I am going to ask.

I bought a pay-as-you-go sim card in singapore last october and am thinking of lending it to a friend. Question is - does anyone know for how long it is valid? In other words, is the card still valid?

I think I bought it at Changi Airport and that I vaguely remember that the card is free and all I paid for was the amount on the card. Many thanks.