From VoIP.ms Wiki
Bria for Android
Once you launch the VoIP app you will need to select the 'More' option at the top right of the screen, and then select "Settings" and then "Account Settings".
- Display Name
This value is used to set outgoing Caller ID. You can leave it blank.
- Username (Your Account or sub account)
Please enter the username provided when you signup (e.g. 123456 or 123456_XXX).
Enter the password provided when you (Signup).
Enter houston.voip.ms (Voip.ms Servers)
- Authorization Name
Please enter the username for your account or sub account.
We are finished now please click on the "login" button to save your change and start making calls.