This person stated that he is my friend "kelvin lau" from Malaysia. Firstly, he was quite reluctant to give me his name when I asked him for it. he keep saying "you don't remember my voice?", I kept asking for his name and I told him that I don't care about his voice. after that, when I exposed him that I do not know any person named "kelvin lau" from Malaysia. he immediately hung up the call. Just beware of this kind of call even if it's your existing friends, get hold of the full details before doing anything.