I need to make international landline/mobile calls. My laptop with Debian is failing me here and iPad failing here. I want to use Google Voice because it is far cheaper than my local carriers.

I tried to use their marketed Google Voice -mobile but for some reason it seems to turn into my carrier -version of "phone" or actually I am not sure whether it is the right version. I am looking for the same Google Voice as in Desktop: you open up Gmail and then there type the number to make cheap calls to which you pay through your Google Wallet.

So how can I call, using Google Voice and Google Wallet, in my Android -phone?