I got calls from 'business department? (looks like internet phone)' at around 6pm on 23/09/19. the first call was not clear, and I hung up, saying 'please text me'. he called me again , saying Michael from Starhub, and told me i won $50k prize at Changi airport promotion. he asked me to turn on video and to show my id card so as that they can send me $50k in 5 min. i wondered for a while and turned on my computer, then, i found similar cases through google search. i hung up the phone immediately. He called me a couple of times, but i didn't respond. when i got calls, the screen showed "business department" (no number), and when turning on video, it showed starhub logo only. luckily, i have my computer nearby, thus i didn't show my Id. If not, i perhaps showed my ID. 

Scammers are sneaky, so please be vigilant.