The scammer first contacted me the evening before. he started with " do you know who i am?", as he sounded alike my friend i unknowingly gave out my friend's name (wei ming). he then went along with it and say that he lost his phone and to change to this number. this was a clear sign of social engineering.

The next day, he called me and asked me if i know how to change the official contact in the POSB app as he had to make some payment for some renovation at home. he sent me a few pictures and i instructed him to click on change particular. 5 mins later, he called back and said he couldn't change the number as he forgot the answers to his security questions. He then asked if i could pay for him first, and he would pay me back. feeling suspicious as i know this friend quite well knowing he stays with multiple roommates, i said i had no money. he was easy-going and said ok before hanging up.

I immediately reported and blocked his number on WhatsApp. fortunately, not losing any money.