To set up GS Wave, you will need to install it from the Play Store. It should come up as the first item when you search GS Wave, it's current name shows as "Grandsteam Wave - Video". Once installed, it should prompt for permissions, after you accept it should pull up the keypad. Down at the bottom right you should see Settings, tap this and then account settings. Tap the + at the top right, and you can choose to use UCM Account (Scan QR Code) or UCM Account (Select QR Code Image) depending on if you downloaded the image to your phone or are scanning it off your computer. Once you scan the code, you should be prompted to add the account, accept, and setup is complete. The account showing as your extension should turn green after a moment, and then you are good to make and receive calls from the app.