1) Open the app store and search for "Zoiper"
2) Once Zoiper has been installed, open up the app and
click the "settings" icon in the bottom right hand corner.
3) From the settings menu, Select Accounts and press the + icon in the top right hand corner to add an account.
4) Select "Yes" to indicate you already have a username and password
5) Select "Manual configuration" from the next menu.
6) Select "SIP Account" from the next menu.
7) In this menu,
i) Give the account a name (e.g. Callwise 2002)
ii) In the Domain field, fill in your Callwise Domain (e.g. xyz123.callwise.net)
iii) In the User name field, fill in your Callwise user (e.g. 2002)
iv) In the Password field, fill in your Callwise password.
v) Leave the caller ID field blank.
8) Scroll down to and select the Network Settings menu
9) In the Transports menu, select TCP
10) Press the green Register button at the top of the window. The screen should change to say Registration Status: OK
11) Zoiper is now set up and configured on your device. Incoming calls to 2002 will ring on your phone and you can make calls directly using Zoiper by selecting the Dialpad screen from the main menu.