For Android users, you may encounter an issue wherein your wireless bluetooth headphones/earphones disconnect once a call starts. Here's one thing to try for troubleshooting
​
1. Go to your phone's Settings > Location
​

2. Click on App Permissions

3. Click Chrome
​

4. Click See all Chrome Permissions

5. Click Nearby devices then Allow.
​

Once you click Allow, close the Chrome app (from your recently open apps pane) then open the app again and try to make a test call.
​

If the issue still persists, do contact support on the SeriousMD app.