Please forward to all your friends who use Uber/Grab, especially ladies:
Lately there have been cases of Uber and Grab drivers cancelling rides after accepting (to view your contact number), and then calling the riders using a separate mobile phone to ask if they are willing to accept drivers who are using a different car and different driver.
NEVER accept these offers, as you might become a victim of cheating, robbery or rape, or kidnap. Once you get into the car, there's not much you can do if driver turns off the route into an isolated lane where accomplices are waiting in ambush. Uber/Grab cannot help you once you use these drivers.