whats VoIP?is it the same with nimbuz as u refer to you title?well i had a problem with nimbuz wen i had my samsung monte. i couldnt download nimbuz on it. but all things resolved. here's what i have done..i just browse the samsung application for any free apps for my fon..such games and other apps..surprisingly, i bump to an apps that i was looking for..which is the nimbuz..so i downloaded it through samsung applications..so try to check your samsung apps. maybe there you can also find the free download for nimbuz..from there you can use the nimbuz!

hope that helps you!