took cab, found a N85 inside, browse through phone contact for wife, don't know which is wife, browse through sms, assume one of the person is wife, call and ask for meetup and return.
turn out the owner drop at Pasir Ris, we took the cab at Serangoon. He's lucky the passenger between our trip din't notice the phone, which i pretty sure there's a passenger after him and before us, the cab driver can't possible go from Pasir Ris to Serangoon without picking up any passenger rite? and pretty sure anyone else who pick it up won't return to him.
but he doesn't seem one bit worried about the lost phone.