Setup Groundwire for Android -

Open up the google playstore
In the search bar at the top type ‘groundwire’
Locate the application labelled ‘Groundwire: VoIP SIP Softphone’ and install it. Note: You will be required to make a once off purchase of the application
Once installed, Open the application Accept\Allow all permission requests
When at the dialpad screen, press the ‘No Account’ icon up the top left
Press Manage Accounts
Press the + button to add a new account
Select ‘New SIP Account’
Enter the details provided by XSTRA A display name for your extension (Usually your name or Extension number) The extension number The password provided to you The PBX server address Save
Go back
The green indicates that it successfully registered\activated. If you see grey or red please contact XSTRA
Tap the indicator at the top left of the screen to bring up the accounts popup
Tap the MANAGE ACCOUNTS link
Tap your extension you just added
Go to Advanced Settings
Go to Codecs for Wifi
Using the 2 lines on the right, you can re-arrange the codecs. Move all of them to the Disabled Codecs section except for G.711 ULAW and G.711 ALAW. Move OPUS from the disabled one up to enabled and make sure it is at the top.
Repeat the same step but in the Codecs for Mobile section

7.4.5. Setup Groundwire for Android