USSD Secret Code to Cancel Flash Messages on Vodafone Vi

I had tried several options to prevent Flash Messages on my vi mobile phone 📱 number by either sending SMS CAN FLASH to 144/199 or have tried Vi app and even chat support. But eventually failed 😌 in every process. Everytime I had received "Your request has failed" SMS in reply. The irritating pop-up messages are still flashing on the screen.

I suddenly got this message (above screenshot) on my screen. Immediately I have tried this USSD Secret Code by dialing *199*2*2*4# using the Vi SIM. I had received a blank message in reply. But noticed that my agony has come to an end.