Prashant is considered in kathmandu(the captial), Pokhara, Illam and many more regions as NEPALI IDOL. Its not just people but National Dailies, News Agency, Big Sponsors like Tobacoo Company, Brewery, Dislitery and Soft Drinks makers in Nepal is funding for sms Voting from Nepal.
Apart from those big players there are thousands of crazy fans in capital itself, who would never stop voting Prashant, despite his performance. The II3 game is turning exactly like SRGMP Challenge 2005, where whole EAST supported Debojit (no offence to his fans) over many better singers than him like HemaChandra, Nihira and more.
So, if its only public vote which will decide II, then the chances of Prashant winning is very very high.