Has anyone got a Voyager VoIP number working via a softphone ?

I'm fairly confident I'm using the right settings etc, but keep getting errors regarding authorization no matter what software/app I use. I've confirmed password, Voyager said they dont prevent multiple devices, so Im puzzled as to why its not letting me in....  maybe I am screwing something up, so hence my asking here before I go back to Voyager to check their logs/settings :-p

Current settings Im trying with Zoiper5 :

Domain : sip.voyager.co.nz

username: (myusername)@(voipaccount?).sip.voyager.co.nz

Password (duh)

I've tried just myusername as the username as well but same issue.

Feel free to suggest a better/diff softphone (ideally after one for Android, and Windows)