for inkigayo voting, its very easy to get the app and sign up! just create your account with either gmail or yahoo. but before choosing your country, change the language to korean on your phone, and then it's extremely easy and fast!
This was not the case when I signed up lol. It would NOT let me register and I nearly pulled all my hair out before I finally got it working, but I hope more Babys were able to sign up as easily as you were ^^