if u are calling back to SG or calling to other overseas number,
it depends on which network u are connect to over there....
yes. for both calls and SMSes
if u are thinking of logging onto the net while overseas, do not do
so.
just relax and enjoy the trip
unless u are prepared to receive a shocking bill
if u are going to be there for a long period of time, buy their
local calling cards or those prepaid sim card.